- Fuzzy α-cut and related mathematical structuressoco, 25(1):207-213, 2021. [doi]

- o1: A Diagram System for Universe Without Boundarylu, 13(3):289-346, 2019. [doi]

- Fuzzy topology via fuzzy geometric logic with graded consequenceijar, 80:334-347, 2017. [doi]

- ediagrams 2016: 107-122 [doi]
- On Some Issues in the Foundation of Rough Sets: the Problem of DefinitionFUIN, 148(1-2):123-132, 2016. [doi]
- The role of metalanguage in graded logical approachesfss, 298:238-250, 2016. [doi]

- Fuzzy relation and fuzzy function over fuzzy sets: a retrospectivesoco, 19(1):99-112, 2015. [doi]

- Membership function based rough setijar, 55(1):402-411, 2014. [doi]
- Graded Consequence with Fuzzy Set of PremisesFUIN, 133(1):1-18, 2014. [doi]

- Rough Sets: Some Foundational IssuesFUIN, 127(1-4):1-15, 2013. [doi]
- Many-Valued Logics, Fuzzy Logics and Graded Consequence: A Comparative Appraisalicla 2013: 197-209 [doi]
- Professor Zdzisław Pawlak (1926-2006): Founder of the Polish School of Artificial IntelligenceIn Andrzej Skowron, Zbigniew Suraj, editors, Rough Sets and Intelligent Systems - Professor Zdzisław Pawlak in Memoriam - Volume 1. Volume 42 of Intelligent Systems Reference Library, pages 1-56, Springer, 2013. [doi]

- Negation and Paraconsistent Logicslu, 5(1):165-176, 2011. [doi]
- Special issue: Rough and Fuzzy Methods for Data Miningijhis, 8(1):1-2, 2011. [doi]
- Generalized Rough Sets and Implication Latticestrs, 14:183-201, 2011. [doi]

- Graded consequence revisitedfss, 161(14):1885-1905, 2010. [doi]

- Some Rough Consequence Logics and their Interrelationstrs, 8:1-20, 2008. [doi]

- Rough Dialogue and Implication LatticesFUIN, 75(1-4):123-139, 2007. [doi]
- Pawlak s Landscaping with Rough Setstrs, 6:51-63, 2007. [doi]
- Formal Topology and Information Systemstrs, 6:253-297, 2007. [doi]

- Algebras from Rough SetsIn Sankar Kumar Pal, Lech Polkowski, Andrzej Skowron, editors, Rough-Neural Computing: Techniques for Computing with Words. Cognitive Technologies, pages 157-188, Springer, 2004.
- Dialogue in Rough Contextrsctc 2004: 295-299 [doi]
- Nonmonotonic Proof Systems: Algebraic FoundationsFUIN, 59(1):39-65, 2004. [doi]

- Foundations of Vagueness : a Category-theoretic ApproachENTCS, 82(4):10-19, 2003. [doi]

- A Study of Interconnections Between Rough and 3-Valued Lukasiewicz LogicsFUIN, 51(3):311-324, 2002.

- Linear Logic and Lukasiewicz - Valued Logic: A Logico-Algebraic Studyjancl, 11(3-4):313-329, 2001.

- Fuzzy relational calculus approach to multidimensional pattern classificationPR, 32(6):973-995, 1999. [doi]

- MV-algebras embedded in a CL-algebraijar, 18(3-4):217-229, 1998. [doi]

- Substitutivity Principles in Some Theories of UncertaintyFUIN, 32(2):107-120, 1997.
- Graded Consequence and Some Metalogical Notions GeneralizedFUIN, 32(3-4):299-311, 1997.

- Rough Sets Through Algebraic LogicFUIN, 28(3-4):211-221, 1996.
- On Representation of Indeterminate Identity via Vague Conceptsjancl, 6(2):191-201, 1996.

- Graded Consequence: Further Studiesjancl, 5(2):227-238, 1995.

- Saturatedness and a Hierarchy of Approximate Identitiesijufks, 2(4):429-444, 1994. [doi]

- Logic of Rough Setssofteks 1994: 223-233