Publications:

• Books
  
• Edited volumes
  
• Papers in journals
  
• Papers in edited volumes
  
• Papers in proceedings
  
• Preprints and research reports
  

| Books

• Grzegorzewski P., Wspomaganie decyzji w warunkach niepewności. Metody statystyczne dla nieprecyzyjnych danych, EXIT, Warszawa, 2006.
  
• Grzegorzewski P., Bobecka K., Dembińska A., Pusz J., Rachunek prawdopodobieństwa i statystyka, WSISiZ, Warszawa, wyd. I i II - 2001, wyd. III - 2002, wyd. IV - 2003, 2005, wyd. V - 2008.
  
• Bobecka K., Grzegorzewski P., Pusz J., Zadania z rachunku prawdopodobieństwa i statystyki, WSISiZ, Warszawa, wyd. I - 2001, wyd. II - 2003, 2005.
  

| Edited volumes

• Borgelt C., Gonzales-Rodriguez G., Trutschnig W., Lubiano M.A., Gil M.A., Grzegorzewski P., Hryniewicz O. (Eds.), Combining Soft Computing and Statistical Methods in Data Analysis, Springer, Heidelberg, 2010. PDF
  
• Dubois D., Lubiano M.A., Prade H., Gil M.A., Grzegorzewski P., Hryniewicz O. (Eds.), Soft Methods for handling Variability and Imprecision, Springer, Heidelberg, 2008.
  
• Lawry J., Miranda E., Bugarin A., Li S., Gil M.A., Grzegorzewski P., Hryniewicz O. (Eds.), Soft Methods for Integrated Uncertainty Modelling, Springer, Heidelberg, 2006.
  
• Grzegorzewski P., Krawczak M., Zadrożny S. (Eds.), Issues in Soft Computing - Theory and Applications, Exit, Warszawa 2005.
  
• Dramiński M., Grzegorzewski P., Trojanowski K., Zadrożny S. (Eds.), Issues in Intelligent Systems - Models and Techniques, Exit, Warszawa 2005.
  
• Lopez-Diaz M., Gil M.A., Grzegorzewski P., Hryniewicz O., Lawry J. (Eds.), Soft Methodology and Random Information Systems, Springer, Heidelberg, 2004.
  
• Grzegorzewski P., Krawczak M., Zadrożny S. (Eds.), Soft Computing - Tools, Techniques and Applications, Exit, Warszawa 2004.
  
• Grzegorzewski P., Mrówka E., Hryniewicz O., Lenz H.J., Wilrich P.Th. (Eds.), Proceedings of the VIII International Workshop on Intelligent Statistical Quality Control - ISQC'04, WSISiZ, Warsaw, 2004.
  
• Grzegorzewski P., Hryniewicz O., Gil M.A. (Eds.), Soft Methods in Probability, Statistics and Data Analysis, Springer, Heidelberg, 2002.
  
• Grzegorzewski P. (Eds.), Wybrane zagadnienia wnioskowania statystycznego z wykorzystaniem pakietu Statgraphics, Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa 2001, 2002.
  

| Papers in journals

• Gągolewski M., Grzegorzewski P., Possibilistic analysis of arity-monotonic aggregation operators and its relation to bibliometric impact assessment of individuals, International Journal of Approximate Reasoning 52 (2011) 1312-1324. PDF
  
• Ban A., Coroianu L., Grzegorzewski P., Trapezoidal approximation and aggregation, Fuzzy Sets and Systems 177 (2011), 45-59. PDF
  
• Grzegorzewski P., The inclusion-exclusion principle for IF-events, Information Sciences 181 (2011), 536-546. PDF
  
• Grzegorzewski P., On possible and necessary inclusion of intuitionistic fuzzy sets, Information Sciences 181 (2011), 342-350. PDF
  
• Gągolewski M., Grzegorzewski P., A geometric approach to the construction of scientific impact indices, Scientometrics 81 (2009), 617-634. PDF
  
• Grzegorzewski P., k-sample median test for vague data, International Journal of Intelligent Systems 24 (2009), 529-539. PDF
  
• Grzegorzewski P., Kendall's correlation coefficient for vague preferences, Soft Computing 13 (2009), 1055-1061.
  
• Grzegorzewski P., Trapezoidal approximations of fuzzy numbers preserving the expected interval - algorithms and properties, Fuzzy Sets and Systems 159 (2008), 1354-1364.
  
• Grzegorzewski P., Mrówka E., Flexible Querying via IF-Sets, International Journal of Intelligent Systems, 22 (2007), 587-597.
  
• Grzegorzewski P., Mrówka E., Trapezoidal approximation of fuzzy numbers - revisited, Fuzzy Sets and Systems 158 (2007), 757-768.
  
• Grzegorzewski P., The coefficient of concordance for vague data, Computational Statistics & Data Analysis 51 (2006), 314-322.
  
• Grzegorzewski P., Mrówka E., Some notes on Atanassov's intuitionistic fuzzy sets, Fuzzy Sets and Systems 156 (2005), 492-495.
  
• Grzegorzewski P., Mrówka E., Trapezoidal approximations of fuzzy numbers, Fuzzy Sets and Systems 153 (2005), 115-135.
  
• Grzegorzewski P., Distances Between Intuitionistic Fuzzy Sets and/or Interval-Valued Fuzzy Sets Based on the Hausdorff Metric, Fuzzy Sets and Systems 148 (2004), 319-328.
  
• Grzegorzewski P., Approximation of a Fuzzy Number Preserving Entropy-Like Nonspecifity, Operations Research and Decisions 4 (2003), 49-59.
  
• Grzegorzewski P., Robustness of Estimation in the Uniform Distribution under Dependencies in a Sample, Communications in Statistics - Theory and Methods 32 (2003), 1155-1168.
  
• Grzegorzewski P., Mrówka E., Trapezoidal Approximations of Fuzzy Numbers, Lecture Notes in Artificial Intelligence 2715 (2003), 237-244.
  
• Grzegorzewski P., Nearest Interval Approximation of a Fuzzy Number, Fuzzy Sets and Systems 130 (2002), 321-330.
  
• Grzegorzewski P., Hryniewicz O., Computing with Words and Life Data, Int. J. Appl. Math. Comput. Sci. 12 (2002), 101-109.
  
• Grzegorzewski P., Wieczorkowski R., Testing Multivariate Normality by Data Transformations, Acta Universitatis Lodziensis - Folia Oeconomica, 156 (2002), 59-73.
  
• Grzegorzewski P., Fuzzy Tests - Defuzzification and Randomization, Fuzzy Sets and Systems 118 (2001), 437-446.
  
• Grzegorzewski P., Conditional Probability and Independence of Intuitionistic Fuzzy Events, Notes on Intuitionistic Fuzzy Sets Vol. 6, No 1, 2000, 7-14.
  
• Grzegorzewski P., Hryniewicz O., Soft Methods in Statistical Quality Control, Control and Cybernetics, 29 (2000), 119-140.
  
• Grzegorzewski P., Testing Statistical Hypotheses with Vague Data, Fuzzy Sets and Systems, 112 (2000), 501-510.
  
• Wieczorkowski R., Grzegorzewski P., Entropy Estimators - Improvements and Comparisons, Communications in Statistics - Simulation and Computation, 28 (1999), 541-567.
  
• Grzegorzewski P., Wieczorkowski R., Entropy-Based Goodness-of-Fit Test for Eponentiality, Communications in Statistics - Theory and Methods, 28 (1999), 1183-1202.
  
• Grzegorzewski P., Statistical Inference about the Median from Vague Data, Control and Cybernetics 27 (1998), 447-464.
  
• Grzegorzewski P., Metrics and Orders in Space of Fuzzy Numbers, Fuzzy Sets and Systems 97 (1998), 83-94.
  
• Grzegorzewski P., Hryniewicz O., Testing Statistical Hypotheses in Fuzzy Environment, Mathware and Soft Computing Vol. 4, No. 3 (1997), 203-217.
  
• Grzegorzewski P., Robustness Against Dependence of Some Nonparametric Tests, Discussiones Mathematicae - Algebra and Stochastic Methods, Vol 15, No. 2 (1995), 203-212.
  
• Grzegorzewski P., The Robustness Against Dependence of Nonparametric Tests for the Two-Sample Location Problem, Appl. Math. 22,4 (1995), 469-476.
  
• Grzegorzewski P., Zasada włączeń i wyłączeń, Delta 6 (1994), 11-13.
  
• Grzegorzewski P., The Infinitesimal Robustness of Tests Against Dependence, Zastos. Mat. 21,3 (1992), 455-460.
  
• Grzegorzewski P., System reprezentantów, czyli rzecz o tłumaczach, komisjach itp., Delta 2 (1992), 3-5.
  
• Grzegorzewski P., Dwupróbkowe nieparametryczne testy położenia, Mat. Stos. 34 (1991), 37-56.
  

| Papers in edited volumes

• Grzegorzewski P., Ziembińska P, Spearman’s rank correlation coefficient for vague preferences, In: FQAS 2011, Christiansen H. et al. (Eds.), Springer, LNAI 7022, 2011, pp. 342-353.
  
• Grzegorzewski P., On the properties of probabilistic implications, In: Eurofuse 2011, De Baets B. et al. (Eds.), Springer, AISC 107, 2011, pp. 67-78.
  
• Grzegorzewski P., Pasternak-Winiarska K., Trapezoidal approximations of fuzzy numbers with restrictions on the support and core, In: Proc. 7th Conf. European Society for Fuzzy Logic and Technology, Atlantis Press, 2011, pp. 749-756.
  
• Grzegorzewski P., Probabilistic implications, In: Proc. 7th Conf. European Society for Fuzzy Logic and Technology, Atlantis Press, 2011, pp. 254-258.
  
• Gągolewski M., Grzegorzewski P., Axiomatic characterizations of (quasi-) L-statistics and S-statistics and the Producer Assessment Problem, In: Proc. 7th Conf. European Society for Fuzzy Logic and Technology, Atlantis Press, 2011, pp. 53-58.
  
• Gągolewski M., Grzegorzewski P., Metody i problemy naukometrii (Methods and problems in scientometrics), In: Psychologia i informatyka. Synergia i kontradykcje, Tadeusiewicz R., Rowiński T. (Eds.), Wyd. UKSW, Warszawa, 2010, pp. 103-126.
  
• Ładyżyński P., Grzegorzewski P., Soft methods in trend detection, In: Combining Soft Computing and Statistical Methods in Data Analysis, Borgelt C. et all. (Eds.), Springer, 2010, pp. 395-402. PDF
  
• Gągolewski M., Grzegorzewski P., S-statistics and their basic properties, In: Combining Soft Computing and Statistical Methods in Data Analysis, Borgelt C. et all. (Eds.), Springer, 2010, pp. 281-288. PDF
  
• Grzegorzewski P., Trapezoidal approximation of fuzzy numbers based on sample data, In: Information Processing and Management of Uncertainty in Knowledge-Based Systems - Applications, Huellermeier E., Kruse R., Hoffmann F. (Eds.), Springer, 2010, pp. 402-411.
  
• Gągolewski M., Grzegorzewski P., Arity-monotonic extended aggregation operators, In: Information Processing and Management of Uncertainty in Knowledge-Based Systems - Theory and Methods, Huellermeier E., Kruse R., Hoffmann F. (Eds.), Springer, 2010, pp. 693-702. PDF
  
• Grzegorzewski P., Algorithms for trapezoidal approximations of fuzzy numbers preserving the expected interval, In: Foundations of Reasoning under Uncertainty, Bouchon-Meunier, B.; Magdalena, L.; Ojeda-Aciego, M.; Verdegay, J.-L.; Yager, R.R. (Eds.), Springer, 2010, pp. 85-98.
  
• Grzegorzewski P., Some notes on measuring the degree of inclusion for IF-sets, In: Advances in Fuzzy Sets, Intuitionistic Fuzzy Sets, Generalized Nets and Related Topics, Vol. I. Foundations, Atanassov K., Hryniewicz O., Kacprzyk J., Krawczak M., Nahorski Z., Szmidt E., Zadrożny S. (Eds.), Exit, 2008, pp. 119-133.
  
• Grzegorzewski P., Statistics with vague data and the robustness to data representation, In: Soft Methods for handling Variability and Imprecision, Dubois D., Lubiano M.A., Prade H., Gil M.A., Grzegorzewski P., Hryniewicz O. (Eds.), Springer, 2008, pp. 100-107.
  
• Grzegorzewski P., The inclusion-exclusion principle for IF-events, In: Developments in Fuzzy Sets, Intuitionistic Fuzzy Sets, Generalized Nets and Related Topics. Foundations. Vol. I, Atanassov K., Bustince H., Hryniewicz O., Kacprzyk J., Krawczak M., Riecan B., Szmidt E. (Eds.), Exit, 2008, pp. 107-131.
  
• Mrówka E., Grzegorzewski P., Friedman's test for ambiguous and missing data, In: Soft Methods for Integrated Uncertainty Modelling, Lawry J., Miranda E., Bugarin A., Li S., Gil M.A., Grzegorzewski P., Hryniewicz O. (Eds.), Springer, Heidelberg, 2006, pp. 111-118.
  
• Grzegorzewski P., Mrówka E., Optimal process calibration under nonsymmetric loss function, In: Frontiers in Statistical Quality Control, Lenz H. J., Wilrich P. Th. (Eds.), Springer, Physica-Verlag, 2006, pp. 309-321.
  
• Mrówka E., Grzegorzewski P., The Fréchet control charts, In: Frontiers in Statistical Quality Control, Lenz H. J., Wilrich P. Th. (Eds.), Springer, Physica-Verlag, 2006, pp. 123-135.
  
• Mrówka E., Grzegorzewski P., Fuzzy numbers and their approximations, In: Issues in Soft Computing - Decisions and Operations Research, Hryniewicz O., Kacprzyk J., Kuchta D. (Eds.), EXIT, Warszawa 2005, pp. 53-69.
  
• Grzegorzewski P., On measuring distances between intuitionistic fuzzy sets, In: Issues in Intuitionistic Fuzzy Sets and Generalized Nets, Atanassov A., Kacprzyk J., Krawczak M. (Eds.), Vol. 2, Wyd. WSISiZ, Warszawa 2004, pp. 107-115.
  
• Grzegorzewski P., Distribution-Free Tests for Vague Data, In: Soft Methodology and Random Information Systems, Lopez-Diaz M., Gil M.A., Grzegorzewski P., Hryniewicz O., Lawry J. (Eds.), Springer, Heidelberg, 2004, pp. 495-502.
  
• Grzegorzewski P., The Generalized Coefficient of Concordance, In: Current Issues in Data and Knowledge Engineering, De Baets B., De Caluwe R., De Tre G., Fodor J., Kacprzyk J., Zadrożny S. (Eds.), Exit, Warszawa, 2004, pp. 241-251.
  
• Grzegorzewski P., Mrówka E., Intuitionistic Fuzzy Events and their Probabilities, In: Issues in Intuitionistic Fuzzy Sets and Generalized Nets, Atanassov A., Kacprzyk J., Krawczak M. (Eds.), Wyd. WSISiZ, Warszawa 2004, pp. 117-123.
  
• Grzegorzewski P., Intuitionistic Fuzzy Numbers - Principles, Metrics and Ranking, In: Soft Computing - Foundations and Theoretical Aspects, Atanassov K.T., Hryniewicz O., Kacprzyk J. (Eds.), Exit, Warszawa 2004, pp. 235-249.
  
• Grzegorzewski P., Mrówka E., Regression Analysis with Fuzzy Data, In: Soft Computing - Tools, Techniques and Applications, Grzegorzewski P., Krawczak M., Zadrożny S. (Eds.), Exit, Warszawa 2004, pp. 65-76.
  
• Mrówka E., Grzegorzewski P., Karty kontrolne Kullbacka-Leiblera, Badania Operacyjne i Systemowe 2004 - Podejmowanie Decyzji, Podstawy Metodyczne i Zastosowania, Kulikowski R., Kacprzyk J., Słowiński R. (Eds.), Exit, Warszawa 2004, pp. 381-399.
  
• Grzegorzewski P., Testy statystyczne do porównywania kart Pareto, In: Metody i techniki analizy informacji i wspomagania decyzji, Bubnicki Z., Hryniewicz O., Kulikowski R. (Eds.), Exit, Warszawa 2002, pp. V-63 - V-69.
  
• Grzegorzewski P., Acceptance sampling Plans by Variables for Vague Data, In: Soft Methods in Probability, Statistics and Data Analysis, Grzegorzewski P., Hryniewicz O., Gil M.A. (Eds.), Springer - Physica Verlag, Heidelberg, 2002, pp. 197-206.
  
• Grzegorzewski P., Mrówka E., Probability of Intuitionistic Fuzzy Events, In: Soft Methods in Probability, Statistics and data Analysis, Grzegorzewski P., Hryniewicz O., Gil M.A. (Eds.), Springer - Physica Verlag, Heidelberg, 2002, pp. 105-115.
  
• Grzegorzewski P., Testing Fuzzy Hypotheses with Vague Data, In: Statistical Modeling, Analysis and Management of Fuzzy Data, Bertoluzza C., Gil M.A., Ralescu D. (Eds.), Springer - Physica Verlag, Heidelberg, 2002, pp. 213-225.
  
• Grzegorzewski P., A Soft Design of Acceptance Sampling Plans by Variables, In: Technologies for Contructing Intelligent Systems. Part 2. Tools, Bouchon-Meunier B., Gutierrez-Rios J., Magdalena L. and Yager R.R. (Eds.), Springer - Physica Verlag, Heidelberg, 2002, pp. 275-286.
  
• Grzegorzewski P., Hryniewicz O., Soft Methods in Hypotheses Testing, In: Soft Computing for Risk Evaluation and Management, Ruan D., Kacprzyk J., Fedrizzi M. (Eds.), Springer - Physica Verlag, Heidelberg, 2001, 55-72.
  
• Grzegorzewski P., Acceptance Sampling Plans by Attributes with Fuzzy Risks and Quality Levels, In: Frontiers in Statistical Quality Control, Lenz H. J., Wilrich P. Th. (Eds.), Springer, Physica-Verlag, 2001, 36-46.
  
• Grzegorzewski P., Interval Aggregation in Data Mining, In: Flexible Query Answering Systems, Larsen H.L., Kacprzyk J., Zadrożny S., Andreasen T., Christiansen H. (Eds.), Springer, 2000, pp. 465-474.
  
• Nycz P., Grzegorzewski P., Interfejs komputerowego systemu do analizy nieprecyzyjnych wyników badań niezawodności, In: Analiza systemowa w finansach i zarządzaniu. Wybrane problemy, Eds. M. Krawczak i J. Hołubiec, WSISiZ, Warszawa, 2000, pp. 150-159.
  
• Mrówka E., Grzegorzewski P., Zastosowanie testów do hipotez rozmytych w tworzeniu rozmytych zapytań, In: Analiza systemowa w finansach i zarządzaniu. Wybrane problemy, Eds. M. Krawczak i J. Hołubiec, WSISiZ, Warszawa, 2000, pp. 135-149.
  
• Grzegorzewski P., Hryniewicz O., Lifetime Tests for Vague Data, In: L.A. Zadeh, J. Kacprzyk (Eds.): Computing with words in information / intelligent systems. Part 2. Applications, Springer - Physica Verlag, Heidelberg, 1999, pp. 176-193.
  

| Papers in proceedings

• Gągolewski M., Grzegorzewski P., O pewnym uogolnieniu indeksu Hirscha, In: Kadry i infrastruktura nowoczesnej nauki: teoria i praktyka, Kawalec P., Lipski P. (Eds.), Wyd. Lubelskiej Szkoły Biznesu, 2009.
  
• Grzegorzewski P., Pasternak-Winiarska K., Bi-symmetrically weighted trapezoidal approximations of fuzzy numbers, In: Proceedings of Ninth International Conference on Intelligent Systems Design and Applications ISDA’09, Piza, Italy, Nov. 30 2009-Dec. 2 2009, IEEE, pp. 318-323.
  
• Grzegorzewski P., Shadowed set approximation of fuzzy numbers, In: Proceedings of Eurofuse 09 Workshop on Preference Modelling and Decision Analysis, Pamplona, Spain, 16-18 September, 2009, pp. 285-290.
  
• Gągolewski M., Grzegorzewski P., Possible and necessary h-indices, In: Proceedings of IFSA World congress and Eusflat Conference IFSA/Eusflat 2009, Lisbon, Portugal, 20-24 July, 2009, pp. 1691-1695.
  
• Grzegorzewski P., Stefanini L., Non-linear shaped approximation of fuzzy numbers, In: Proceedings of IFSA World congress and Eusflat Conference IFSA/Eusflat 2009, Lisbon, Portugal, 20-24 July, 2009, pp. 1535-1540.
  
• Grzegorzewski P., Pasternak-Winiarska K., Weighted trapezoidal approximations of fuzzy numbers, In: Proceedings of IFSA World congress and Eusflat Conference IFSA/Eusflat 2009, Lisbon, Portugal, 20-24 July, 2009, pp. 1531-1534.
  
• Grzegorzewski P., New algorithms for trapezoidal approximation of fuzzy numbers preserving the expected interval, In: Proceedings of the Twelfth International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU'08, L. Magdalena, M. Ojeda-Aciego, J.L. Verdegay (Eds.), Spain, Torremolinos (Málaga), June 22-27, 2008, pp. 117-123.
  
• Grzegorzewski P., A bi-robust test for vague data, In: Proceedings of the Twelfth International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU'08, L. Magdalena, M. Ojeda-Aciego, J.L. Verdegay (Eds.), Spain, Torremolinos (Málaga), June 22-27, 2008, pp. 138-144.
  
• Grzegorzewski P., Jędrej A., Chi-square goodness-of-fit test for vague data, In: Proceedings of the Eleventh International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Paris, France, July 2-7, 2006, pp. 952-956.
  
• Mrówka E., Grzegorzewski P., Testing independence with ambiguous data, In: Proceedings of the Eleventh International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Paris, France, July 2-7, 2006, pp. 739-744.
  
• Grzegorzewski P., Two-sample median test for vague data, In: Proceedings of the 4th Conference of the European Society for Fuzzy Logic and Technology - Eusflat 2005, Barcelona, September 7-9, 2005, pp. 621-626.
  
• Mrówka E., Grzegorzewski P., Friedman's test with missing observations, In: Proceedings of the 4th Conference of the European Society for Fuzzy Logic and Technology - Eusflat 2005, Barcelona, September 7-9, 2005, pp. 627-632.
  
• Grzegorzewski P., On Measuring Association between Preference Systems, Proceedings of the 2004 IEEE International Conference on Fuzzy Systems, Budapest, Hungary, July 25-29, 2004, pp. 133-137.
  
• Grzegorzewski P., Mrówka E., Subsethood Measure for Intuitionistic Fuzzy Sets, In: Proceedings of the 2004 IEEE International Conference on Fuzzy Systems, Budapest, Hungary, July 25-29, 2004, pp. 139-142.
  
• Grzegorzewski P., The Generalized Spearman's Rank Correlation Coefficient, In: Proceedings of the Tenth International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Perugia, Italy, July 4-9, 2004, pp. 1413-1418.
  
• Grzegorzewski P., Mrówka E., On the Entropy of Intuitionistic Fuzzy Sets and Interval-Valued Fuzzy Sets, In: Proceedings of the Tenth International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, Perugia, Italy, July 4-9, 2004, pp. 1419-1426.
  
• Grzegorzewski P., Mrówka E., Optimal Process Calibration under Nonsymmetric Loss Function, In: Proceedings of the VIII International Workshop on Intelligent Statistical Quality Control - ISQC'04, Grzegorzewski P., Mrówka E., Hryniewicz O., Lenz H.J., Wilrich P.Th. (Eds.), Warsaw, Poland, June 14-16, 2004, WSISiZ, pp. 83-94.
  
• Mrówka E, Grzegorzewski P., The Frechet Control Charts, In: Proceedings of the VIII International Workshop on Intelligent Statistical Quality Control - ISQC'04, Grzegorzewski P., Mrówka E., Hryniewicz O., Lenz H.J., Wilrich P.Th. (Eds.), Warsaw, Poland, June 14-16, 2004, WSISiZ, pp. 175-186.
  
• Grzegorzewski P., Distances and Orderings in a Family of Intuitionistic Fuzzy Numbers, In: Proceedings of the Third International Conference in Fuzzy Logic and Technology "Eusflat 2003", Zittau, Germany, September 10-12, 2003, pp. 223-227.
  
• Grzegorzewski P., Mrówka E., Flexible Querying via Intuitionistic Fuzzy Sets, Proceedings of the Third International Conference in Fuzzy Logic and Technology "Eusflat 2003", Zittau, Germany, September 10-12, 2003, pp. 228-231.
  
• Grzegorzewski P., The Hamming Distance Between Intuitionistic Fuzzy Sets, In: Proceedings of the 10th IFSA World Congress - IFSA 2003, Istanbul, Turkey, June 29 - July 2, 2003, pp. 35-38.
  
• Grzegorzewski P., Mrówka E., Linear Regression Analysis for Fuzzy Data, In: Proceedings of the 10th IFSA World Congress - IFSA 2003, Istanbul, Turkey, June 29 - July 2, 2003, pp. 228-231.
  
• Grzegorzewski P., Mrówka E., Trapezoidal Approximation of a Fuzzy Number - a Practical Approach, In: Proceedings of International Conference on Fuzzy Information Processing, Theories and Applications, Y. Liu, G. Chen, M. Ying, K.Y. Cai (Eds.), Beijing, China, March 1-4, 2003, Tsinghua University Press and Springer, pp. 31-35.
  
• Grzegorzewski P., Mrówka E., Approximation of Fuzzy Numbers - Revisited, In: Proceedings of International Conference on Fuzzy Information Processing, Theories and Applications, Y. Liu, G. Chen, M. Ying, K.Y. Cai (Eds.), Beijing, China, March 1-4, 2003, Tsinghua University Press and Springer, pp. 117-121.
  
• Grzegorzewski P., Hryniewicz O., Statistical Inference under Fuzzy Life Data, In: Materiały Warsztatów Naukowych "Algorytmy Ewolucyjne i Optymalizacja Globalna" oraz Konferencji "Systemy Rozmyte", Kraków, 23-25 września 2002, Oficyna Wydawnicza Politechniki Warszawskiej, pp. 160-170.
  
• Grzegorzewski P., Mrówka E., Flexible Querying Using Intuitionistic Fuzzy Sets, In: Materiały Warsztatów Naukowych "Algorytmy Ewolucyjne i Optymalizacja Globalna" oraz Konferencji "Systemy Rozmyte", Kraków, 23-25 września 2002, Oficyna Wydawnicza Politechniki Warszawskiej, pp. 171-180.
  
• Grzegorzewski P., Mrówka E., Independence, Conditional Probability and the Bayes Formula for Intuitionistic Fuzzy Events, In: Proceedings of the Ninth International Conference "Information Processing and Management of Uncertainty in Knowledge-based Systems IPMU'2002", Annecy, July 1-5, 2002, pp. 1851-1858.
  
• Grzegorzewski P., Mrówka E., Soft Querying via Intuitionistic Fuzzy Sets, In: Proceedings of the Ninth International Conference "Information Processing and Management of Uncertainty in Knowledge-based Systems IPMU'2002", Annecy, July 1-5, 2002, pp. 1845-1849.
  
• Grzegorzewski P., Interval Approximation of a Fuzzy Number and the Principle of Information Invariance, Proceedings of the Ninth International Conference "Information Processing and Management of Uncertainty in Knowledge-based Systems IPMU'2002", Annecy, July 1-5, 2002, pp. 347-354.
  
• Grzegorzewski P., Mrówka E., Fuzzy Querying and Random Data, Proceedings of the International Conference in Fuzzy Logic and Technology "Eusflat 2001", Leicester, UK, Sept. 5-7, 2001, pp. 344-347.
  
• Grzegorzewski P., Estimation of the Mean Lifetime from Vague Data, Proceedings of the International Conference in Fuzzy Logic and Technology "Eusflat 2001", Leicester, UK, Sept. 5-7, 2001, pp. 348-351.
  
• Grzegorzewski P., A Soft Design of Acceptance Sampling Plans by Variables, Proceedings of the Eight International Conference "Information Processing and Management of Uncertainty in Knowledge-Based Systems IPMU'2000", Madrid, July 3-7, 2000, pp. 208-214.
  
• Grzegorzewski P., Conditional Probability and Independence of Intuitionistic Fuzzy Events, In: Proceedings of the International Workshop on Partial Knowledge and Uncertainty: Independence, Conditioning, Inference (Eds. R. Scozzafava and B. Vantaggi), Rome, May 4-6, 2000.
  
• Grzegorzewski P., Testing Fuzzy Hypotheses with Vague Data, Proceedings of the 7th European Congress on Intelligent Techniques and Soft Computing EUFIT'99, Aachen 1999, CD-Rom.
  
• Grzegorzewski P., A Soft Design of Acceptance Sampling Plans by Attributes, In: Proceedings of the VIth International Workshop on Intelligent Statistical Quality Control, Würzburg, September 14-16, 1998, ss. 29-38.
  
• Grzegorzewski P., Control Charts for Fuzzy Data, In: Proceedings of the 5th European Congress on Intelligent Techniques and Soft Computing EUFIT'97, Aachen, 1997, ss. 1326-1330.
  
• Grzegorzewski P., Shewhart Control Charts and the Problem of the Detection of Trend, In: Proceedings of the 4th Würzburg-Umea Conference in Statistics, Eds. E. von Collani, R. Göb, G. Kiesmüller, Würzburg 1996, pp. 175-185.
  

| Preprints and research reports

• Gągolewski M., Grzegorzewski P., Possibilistic analysis of arity-monotonic aggregation operators and its relation to bibliometric impact assessment of individuals, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/8/2010.
  
• Grzegorzewski P., Fuzzy number aproximation via shadowed sets, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/4/2010.
  
• Ban A., Coroianu L., Grzegorzewski P., Trapezoidal approximation and aggregation, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/3/2010.
  
• Gągolewski M., Grzegorzewski P., Metody i problemy naukometrii, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/2/2009.
  
• Grzegorzewski P., Kendall's correlation coefficient for vague preferences, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/61/2008.
  
• Grzegorzewski P., Some notes on measuring the degree of inclusion for IF-sets, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/29/2008.
  
• Gągolewski M., Grzegorzewski P., A geometric approach to scientific impact indices construction, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/6/2008.
  
• Grzegorzewski P., New algorithms for trapezoidal approximation of fuzzy numbers preserving the expected interval, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/42/2007.
  
• Grzegorzewski P., Trapezoidal approximations of fuzzy numbers preserving the expected interval - algorithms and properties, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/21/2007.
  
• Grzegorzewski P., Improved trapezoidal approximations of fuzzy numbers, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/20/2007.
  
• Grzegorzewski P., On some basic concepts in probability of IF-events, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/19/2007.
  
• Grzegorzewski P., The inclusion-exclusion principle for IF-events, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/18/2007.
  
• Grzegorzewski P., Mrówka E., Flexible Querying via IF-Sets, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/64/2006.
  
• Grzegorzewski P., Mrówka E., Trapezoidal approximation of fuzzy numbers - revisited, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/11/2006.
  
• Grzegorzewski P., k-sample median test for vague data, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/33/2005.
  
• Grzegorzewski P., On invariance of the canonical representation of fuzzy numbers under trapezoidal approximations, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/49/2004.
  
• Grzegorzewski P., Olwert A., Robustness of estimation in the exponential distribution under dependencies in a sample, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/48/2004.
  
• Grzegorzewski P., Statistical tests for comparing Pareto charts, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/8/2004.
  
• Grzegorzewski P., Intuitionistic fuzzy numbers, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/1/2004.
  
• Grzegorzewski P., Mrówka E., Optimal process calibration under nonsymmetric loss function, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/28/2003.
  
• Grzegorzewski P., The generalized Spearman's rank correlation coefficient, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/26/2003.
  
• Grzegorzewski P., Mrówka E., On the entropy of intuitionistic fuzzy sets and interval-valued fuzzy sets, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/25/2003.
  
• Grzegorzewski P., Hryniewicz O., Mrówka E., Analiza skutecznoœci metody kontroli masy netto towarów paczkowanych dla wybranych linii produkcyjnych, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/24/2003.
  
• Grzegorzewski P., Distances between intuitionistic fuzzy sets and/or interval-valued fuzzy sets based on the Hausdorff metric, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/18/2003.
  
• Grzegorzewski P., Mrówka E., Trapezoidal approximations of fuzzy numbers, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/43/2002.
  
• Grzegorzewski P., Robustness of estimation in the uniform distribution under dependencies in a sample, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/8/2002.
  
• Grzegorzewski P., Mrówka E., Conditional probability, independence, total probability rule and Bayes' theorem for intuitionistic fuzzy events, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/7/2002.
  
• Grzegorzewski P., Separable fuzzy relations, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/11/2001.
  
• Grzegorzewski P., Interval approximation of a fuzzy number and the principle of information invariance, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/10/2001.
  
• Grzegorzewski P., Mrówka E., Probability measures of intuitionistic fuzzy events, Research Report of Systems Research Institute, Polish Academy of Sciences, RB/01/2001.
  
• Grzegorzewski P., Wieczorkowski R., Testing multivariate normality by data transformations, Preprint of Faculty of Mathematics and Information Science, Warsaw University of Technology, December 1999.
  
• Grzegorzewski P., Testing statistical hypotheses with vague data, Working Paper of Systems Research Institute, Polish Academy of Sciences, WP-2-1997.
  
• Grzegorzewski P., Statistical inference about the population median from vague data, Working Paper of Systems Research Institute, Polish Academy of Sciences, WP-2-1996.
  
• Grzegorzewski P., Nonparametric control charts, Technical Report, University of Würzburg, 1996.
  
• Grzegorzewski P., Hryniewicz O., Testing statistical hypotheses in fuzzy environment, Working Paper of Systems Research Institute, Polish Academy of Sciences, WP-6-1995.
  
• Grzegorzewski P., Nonparametric control charts, Working Paper of Systems Research Institute, Polish Academy of Sciences, WP-5-1995.