Konferencje
- Classical Algebraic Structures, referat: Chain rings and their generalizations, Międzynarodowe Centrum Matematyczne im. Stefana Banacha, Warszawa, 1988
- Summer School on General Algebra and Ordered Sets, referat: On rings with distributive lattices of left ideals and their generalization , Donovaly, Słowacja, 1990
- International Conference on the Theory of Radicals, referat: The distributive radical, Szekszard, Węgry, 1991
- Summer School on General Algebra and Ordered Sets, referat: On a class of radicals of rings, Herlany, Słowacja, 1992
- Some Trends in Algebra: Modules and their extensions, referat: Rings with linearly ordered lattice of left ideals, Charles University, Praga, Czechy, 1993
- International Conference on Groups and Group Rings, referat: On left chain rings, Gliwice, 1993
- International Conference on Groups and Group Rings, referat: On distributive group rings, Gliwice, 1994
- Ring Theory Conference (A satellite conference of the Second European Congress in Mathematics), referat: Examples of chain rings, Miscolc, Węgry, 1996
- Ring Theory, Working group, referat: On classical radicals of distributive rings, Międzynarodowe Centrum Matematyczne im. Stefana Banacha, Warszawa, 2002
- International Conference on Algebras, Modules and Rings, referat: Pseudo-chain rings and pseudo-uniserial modules, Lizbona, Portugalia, 2003
- Podlaska Konferencja Matematyki, referat: Radykały uogólnień pierścieni łańcuchowych, Białystok, 2004
- Druga Podlaska Konferencja Matematyki, referat: Regularne pierścienie skośnych uogólnionych szeregów potęgowych, Białystok, 2006
- International Conference on Modules and Comodules (dedicated to Robert Wisbauer), referat: On skew generalized power series rings, Porto, Portugalia, 2006
- International Conference Groups and Their Actions, referat: On the structure of skew generalized power series rings, Będlewo (koło Poznania), 2007
- International Conference on algebraic and combinatorial methods in concrete classes of algebras and groups, referat: Skew generalized power series rings, Alden Biesen, Belgia, 2007
- Trzecia Podlaska Konferencja Matematyki, referat: O pewnej klasie u.p.-monoidów, Białystok, 2008
- Workshop “Radicals of rings and related topics”, referat: Radicals of right chain rings and of their generalizations, Międzynarodowe Centrum Matematyczne im. Stefana Banacha, Warszawa, 2009
- 4th Podlasie Conference on Mathematics, referat: Rings with linearly ordered right annihilators, Białystok, 2010