On Convergence of Rough Sets. - Lech T. Polkowski (Intelligent Decision Support, 1992)

On Rough Mereological Constructibility: Anaphorically Constructible Many-Object Events. - Lech T. Polkowski; Maria Semeniuk-Polkowska (Mathematical Aspects of Natural and Formal Languages, 1994)

Rough Mereology. - Lech Polkowski; Andrzej Skowron (ISMIS, 1994)

Rough Mereology and Analytical Morphology: New Development in Rough Set Theory. - Lech Polkowski; Andrzej Skowron (WOCFAI, 1995)

Parallel Communicating Grammar Systems with Negotiation. - Gheorghe Paun; Lech Polkowski; Andrzej Skowron (Fundam. Informaticae, 1996)

Analytical Morphology: Mathematical Morphology of Decision Tables. - Andrzej Skowron; Lech Polkowski (Fundam. Informaticae, 1996)

Adaptive Decision-Making by Systems of Cooperating Intelligent Agents Organized on Rough Mereological Principles. - Lech Polkowski; Andrzej Skowron (Intell. Autom. Soft Comput., 1996)

Rough mereology: A new paradigm for approximate reasoning. - Lech Polkowski; Andrzej Skowron (Int. J. Approx. Reason., 1996)

Rough Sets for Data Mining and Knowledge Discovery (Abstract). - Henryk Jan Komorowski; Lech Polkowski; Andrzej Skowron (PKDD, 1997)

Rough Set Approximations of Languages. - Gheorghe Paun; Lech Polkowski; Andrzej Skowron (Fundam. Informaticae, 1997)

Decision Algorithms: A Survey of Rough Set - Theoretic Methods. - Andrzej Skowron; Lech Polkowski (Fundam. Informaticae, 1997)

Towards a Rough Mereology-Based Logic for Approximate Solution Synthesis. Part 1. - Henryk Jan Komorowski; Lech Polkowski; Andrzej Skowron (Stud Logica, 1997)

Rough Mereological Foundatins for Design, Analysis, Synthesis, and Control in Distributed Systems. - Andrzej Skowron; Lech Polkowski (Inf. Sci., 1998)

Grammar Systems for Distributed Synthesis of Approximate Solutions Extracted from Experience. - Lech Polkowski; Andrzej Skowron (Grammatical Models of Multi-Agent Systems, 1999)

Toward Spatial Reasoning in the Framework of Rough Mereology. - Lech Polkowski (RSFDGrC, 1999)

Calculi of Granules Based on Rough Set Theory: Approximate Distributed Synthesis and Granular Semantics for Computing with Words. - Lech Polkowski; Andrzej Skowron (RSFDGrC, 1999)

Marcus Topologies and Applications to Granular Semantics over Mereological Granules of Knowledge. - Lech Polkowski; Maria Semeniuk-Polkowska (Recent Topics in Mathematical and Computational Linguistics, 2000)

Synthesis Grammars. - Lech Polkowski; Andrzej Skowron (Recent Topics in Mathematical and Computational Linguistics, 2000)

Spatial Reasoning via Rough Sets. - Lech Polkowski (Rough Sets and Current Trends in Computing, 2000)

Rough-Neuro Computing. - Lech Polkowski; Andrzej Skowron (Rough Sets and Current Trends in Computing, 2000)

Rough Mereology in Information Systems with Applications to Qualitative Spatial Reasoning. - Lech Polkowski; Andrzej Skowron (Fundam. Informaticae, 2000)

Towards grammars of decision algorithms. - Lech Polkowski; Andrzej Skowron (Where Mathematics, Computer Science, Linguistics and Biology Meet, 2001)

Meticulous Rough Inclusion and Its Relations to Fuzzy Inclusion. - Masahiro Inuiguchi; Lech Polkowski (FUZZ-IEEE, 2001)

On Fractals in Information Systems: The First Step. - Lech Polkowski (JSAI Workshops, 2001)

Rough Mereological Calculi of Granules: A Rough Set Approach to Computation. - Lech Polkowski; Andrzej Skowron (Comput. Intell., 2001)

On Connection Synthesis via Rough Mereology. - Lech Polkowski (Fundam. Informaticae, 2001)

On Asymptotic Properties of Rough-Set-Theoretic Approximations. Fractal Dimension, Exact Sets, and Rough Inclusion in Potentially Infinite Information Systems. - Lech Polkowski (Rough Sets and Current Trends in Computing, 2002)

On Fractal Dimension in Information Systems. Toward Exact Sets in Infinite Information Systems. - Lech Polkowski (Fundam. Informaticae, 2002)

A Rough Set Approach to Estimating the Game Value and the Shapley Value from Data . - Lech Polkowski; Boleslaw Araszkiewicz (Fundam. Informaticae, 2002)

On Spatial Reasoning via Rough Mereology. - Lech Polkowski (Grammars and Automata for String Processing, 2003)

Rough-Fuzzy-Neurocomputing Based on Rough Mereological Calcus of Granules. - Lech Polkowski; Maria Semeniuk-Polkowska (HIS, 2003)

Computing from words via rough mereology in mobile robot navigation. - Adam Szmigielski; Lech Polkowski (IROS, 2003)

A Rough Set Paradigm for Unifying Rough Set Theory and Fuzzy Set Theory. - Lech Polkowski (RSFDGrC, 2003)

Rough Mereology: A Survey of New Developments with Applications to Granular Computing, Spatial Reasoning and Computing with Words. - Lech Polkowski (RSFDGrC, 2003)

Conjugate Information Systems: Learning Cognitive Concepts in Rough Set Theory. - Maria Semeniuk-Polkowska; Lech Polkowski (RSFDGrC, 2003)

Rough Mereology: A Rough Set Paradigm for Unifying Rough Set Theory and Fuzzy Set Theory. - Lech Polkowski (Fundam. Informaticae, 2003)

A Survey of Recent Results on Spatial Reasoning via Rough Inclusions. - Lech Polkowski (IMTCI, 2004)

Sets of Communicating Sequential Processes. A Topological Rough Set Framework. - Lech Polkowski; Maria Semeniuk-Polkowska (KES, 2004)

Mereological Foundations to Approximate Reasoning. - Lech Polkowski (MSRAS, 2004)

Rough Mereology as a Language for a Minimalist Mobile Robot's Eenvironment Description. - Lech Polkowski; Adam Szmigielski (MSRAS, 2004)

Toward Rough Set Foundations. Mereological Approach. - Lech Polkowski (Rough Sets and Current Trends in Computing, 2004)

A Note on 3-valued Rough Logic Accepting Decision Rules. - Lech Polkowski (Fundam. Informaticae, 2004)

Some Remarks on Sets of Communicating Sequential Processes in Topological Rough Set Framework. - Lech Polkowski; Maria Semeniuk-Polkowska (Fundam. Informaticae, 2004)

Preface. - Guoyin Wang 001; Qing Liu 011; Tsau Young Lin; Yiyu Yao; Lech Polkowski (Fundam. Informaticae, 2004)

First Steps Towards Computably-Infinite Information Systems. - Peter Apostoli; Akira Kanda; Lech Polkowski (Trans. Rough Sets, 2004)

Rough Mereology as a Link Between Rough and Fuzzy Set Theories. A Survey. - Lech Polkowski (Trans. Rough Sets, 2004)

Rough-Neuro Computing: An Introduction. - Sankar Kumar Pal; James F. Peters; Lech Polkowski; Andrzej Skowron (Rough-Neural Computing: Techniques for Computing with Words, 2004)

A Rough-Neural Computation Model Based on Rough Mereology. - Lech Polkowski (Rough-Neural Computing: Techniques for Computing with Words, 2004)

Rough Sets. - Zdzislaw Pawlak; Lech Polkowski; Andrzej Skowron (Encyclopedia of Database Technologies and Applications, 2005)

On granular computing and approximations to classifiers. - Lech Polkowski (DMIN, 2005)

Formal granular calculi based on rough inclusions. - Lech Polkowski (GrC, 2005)

On Rough Set Logics Based on Similarity Relations. - Lech Polkowski; Maria Semeniuk-Polkowska (Fundam. Informaticae, 2005)

Rough-fuzzy-neurocomputing based on rough mereological calculus of granules. - Lech Polkowski (Int. J. Hybrid Intell. Syst., 2005)

A model of granular computing with applications. granules from rough inclusions in information systems. - Lech Polkowski (GrC, 2006)

Rough Mereological Reasoning in Rough Set Theory: Recent Results and Problems. - Lech Polkowski (RSKT, 2006)

Preface. - Mariusz Flasinski; Edward Nawarecki; Lech Polkowski; Robert Schaefer; Jerzy Stefanowski; Zbigniew Suraj (Fundam. Informaticae, 2006)

A Set Theory for Rough Sets. Toward A Formal Calculus of Vague Statements. - Lech Polkowski (Fundam. Informaticae, 2006)

The Paradigm of Granular Rough Computing: Foundations and Applications. - Lech Polkowski (IEEE ICCI, 2007)

Granular Computing: Granular Classifiers and Missing Values. - Lech Polkowski; Piotr Artiemjew (IEEE ICCI, 2007)

Granulation of Knowledge in Decision Systems: The Approach Based on Rough Inclusions. The Method and Its Applications. - Lech Polkowski (RSEISP, 2007)

On Granular Rough Computing with Missing Values. - Lech Polkowski; Piotr Artiemjew (RSEISP, 2007)

On Granular Rough Computing: Factoring Classifiers Through Granulated Decision Systems. - Lech Polkowski; Piotr Artiemjew (RSEISP, 2007)

Concept Approximation in Mathematics and Computer Science. An Essay in Homage to Zdzislsaw Pawlak. - Lech Polkowski (Fundam. Informaticae, 2007)

Granular Computing: Toward Inner Logics in Decision Systems. An Abstract of the Talk at IEEE GrC2008. - Lech Polkowski (GrC, 2008)

Rough Mereology in Classification of Data: Voting by Means of Residual Rough Inclusions. - Lech Polkowski; Piotr Artiemjew (RSCTC, 2008)

A Framework for Multiagent Mobile Robotics: Spatial Reasoning Based on Rough Mereology in Player/Stage System. - Lech Polkowski; Pawel Osmialowski (RSCTC, 2008)

Rough Mereology in Analysis of Vagueness. - Lech Polkowski (RSKT, 2008)

On the Idea of Using Granular Rough Mereological Structures in Classification of Data. - Lech Polkowski (RSKT, 2008)

Reasoning about Concepts by Rough Mereological Logics. - Lech Polkowski; Maria Semeniuk-Polkowska (RSKT, 2008)

On Foundations and Applications of the Paradigm of Granular Rough Computing. - Lech Polkowski; Maria Semeniuk-Polkowska (Int. J. Cogn. Informatics Nat. Intell., 2008)

Mereological Theories of Concepts in Granular Computing. - Lech Polkowski (Trans. Comput. Sci., 2008)

A Study in Granular Computing: On Classifiers Induced from Granular Reflections of Data. - Lech Polkowski; Piotr Artiemjew (Trans. Rough Sets, 2008)

On Classifying Mappings Induced by Granular Structures. - Lech Polkowski; Piotr Artiemjew (Trans. Rough Sets, 2008)

Rough Set Theory. - Zdzislaw Pawlak; Lech Polkowski; Andrzej Skowron (Wiley Encyclopedia of Computer Science and Engineering, 2008)

Rough Sets In Data Analysis: Foundations and Applications. - Lech Polkowski; Piotr Artiemjew (Applications of Computational Intelligence in Biology, 2008)

On Knowledge Granulation and Applications to Classifier Induction in the Framework of Rough Mereology. - Lech Polkowski; Piotr Artiemjew (Int. J. Comput. Intell. Syst., 2009)

Data-Mining and Knowledge Discovery: Case-Based Reasoning, Nearest Neighbor and Rough Sets. - Lech Polkowski (Encyclopedia of Complexity and Systems Science, 2009)

Granulation of Knowledge: Similarity Based Approach in Information and Decision Systems. - Lech Polkowski (Encyclopedia of Complexity and Systems Science, 2009)

Granulation of Knowledge by Tools of Rough Mereology. - Lech Polkowski (GrC, 2010)

Spatial Reasoning Based on Rough Mereology: A Notion of a Robot Formation and Path Planning Problem for Formations of Mobile Autonomous Robots. - Pawel Osmialowski; Lech Polkowski (Trans. Rough Sets, 2010)

Granular Rough Mereological Logics with Applications to Dependencies in Information and Decision Systems. - Lech Polkowski; Maria Semeniuk-Polkowska (Trans. Rough Sets, 2010)

Granular computing in the frame of rough mereology. A case study: Classification of data into decision categories by means of granular reflections of data. - Lech Polkowski; Piotr Artiemjew (Int. J. Intell. Syst., 2011)

Approximate Reasoning by Parts - An Introduction to Rough Mereology - Lech Polkowski (Springer, 2011)

Granular Mereotopology: A First Sketch. - Lech Polkowski; Maria Semeniuk-Polkowska (CS&P, 2013)

On a Notion of Extensionality for Artifacts. - Maria Semeniuk-Polkowska; Lech Polkowski (Fundam. Informaticae, 2013)

An Implementation of the Zdzisław Pawlak Idea for Reasoning about Uncertainty: Approximate Reasoning by Parts. - Lech Polkowski; Maria Semeniuk-Polkowska (Rough Sets and Intelligent Systems (1), 2013)

Boundaries, Borders, Fences, Hedges. - Lech Polkowski; Maria Semeniuk-Polkowska (Fundam. Informaticae, 2014)

On the Problem of Boundaries from Mereology and Rough Mereology Points of View. - Lech Polkowski; Maria Semeniuk-Polkowska (Fundam. Informaticae, 2014)

Betweenness, Lukasiewicz Rough Inclusions, Euclidean Representations in Information Systems, Hyper-granules, Conflict Resolution. - Lech T. Polkowski (CS&P, 2015)

Where Rough Sets and Fuzzy Sets Meet. - Lech Polkowski; Maria Semeniuk-Polkowska (Fundam. Informaticae, 2015)

Granular Computing in Decision Approximation - An Application of Rough Mereology - Lech Polkowski; Piotr Artiemjew (Springer, 2015)

A Version of Rough Mereology Suitable for Rough Sets. - Lech Polkowski (CS&P, 2016)

A New Classifier Based on the Dual Indiscernibility Matrix. - Piotr Artiemjew; Bartosz A. Nowak; Lech T. Polkowski (ICIST, 2016)

Rough Sets of Zdzisław Pawlak Give New Life to Old Concepts. A Personal View .... - Lech T. Polkowski (IJCRS, 2016)

Betweenness, Łukasiewicz Rough Inclusions, Euclidean Representations in Information Systems, Hyper-granules and Conflict Resolution. - Lech T. Polkowski; Bartosz A. Nowak (Fundam. Informaticae, 2016)

On Mereology as a Tool in Problems of Intelligent Control, Granular Computing, Data Analysis and Approximate and Spatial Reasoning. - Lech Polkowski (IJCRS (2), 2017)

From Leśniewski, Łukasiewicz, Tarski to Pawlak: Enriching Rough Set Based Data Analysis. A Retrospective Survey. - Lech T. Polkowski (Fundam. Informaticae, 2017)

Theory of Mind and Empathy. Part I - Model of Social Emotional Thinking. - Andrzej W. Przybyszewski; Lech T. Polkowski (Fundam. Informaticae, 2017)

The Bayes Theorem Counterpart in Mass-Based Rough Mereology. - Lech Polkowski (CS&P, 2018)

Robot Navigation and Path Planning by Means of Rough Mereology. - Lech Polkowski; Lukasz Zmudzinski; Piotr Artiemjew (IRC, 2018)

Introducing Dynamic Structures of Rough Sets. The Case of Text Processing: Anaphoric Co-reference in Texts in Natural Language. - Wojciech Budzisz; Lech T. Polkowski (IJCSR, 2018)

On logical and mereological renderings of the Bayes theorem (short paper). - Lech Polkowski (CS&P, 2019)

Introducing Mass-based Rough Mereology in a Mereological Universe with Relations to Fuzzy Logics and a Generalization of the Łukasiewicz Logical Foundations of Probability. - Lech Polkowski (Fundam. Informaticae, 2019)

Jan Łukasiewicz Life, Work, Legacy - On the Centenary of the Farewell Lecture at Warsaw University During Which Jan Łukasiewicz Introduced Multi-valued Logic and on His 140th Birth Anniversary in the Year of 100th Anniversary of Regained Polish Independence. - Lech Polkowski (Trans. Rough Sets, 2019)

A Logic for Spatial Reasoning in the Framework of Rough Mereology. - Lech Polkowski (Trans. Rough Sets, 2019)

On the Compactness Property of Mereological Spaces. - Lech Polkowski (Fundam. Informaticae, 2020)

Logic: Reference Book for Computer Scientists - The 2nd Revised, Modified, and Enlarged Edition of "Logics for Computer and Data Sciences, and Artificial Intelligence" - Lech T. Polkowski (Springer, 2023)

On rough mereology and VC-dimension in treatment of decision prediction for open world decision systems. - Lech T. Polkowski (CoRR, 2024)

Machine Learning via rough mereology. - Lech T. Polkowski (CoRR, 2024)