; On associative ring multiplication on mixed groups5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; On some lattice dimensions of finite groups5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; On rings with a finite number of orbits5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; On commutative, noetherian, filial rings5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; 5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; On the certified proofs of Hall Marriage Theorem and Dilworth Theorem5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; On the formalization of the Sperner theorem5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
; A graded nearness of information granules5th Podlasie Conference on Mathematics, Białystok, Poland, Jun 25-28, 2012; PTM, Białystok University of Technology, University of Białystok (org.)
P. Kielanowski, A. Odzijewicz; Modelling Belief Change and Nonmonotonic Inference in Scott's Information Systems7th International Symposium on Intelligent Information Systems, Malbork, Poland, Jun 15-19, 1998
M. Szajewska; On the Bianchi and Backlund transformations of two dimensional surfaces in four dimensional Euclidean spaceInternational Workshop on Bäcklund and Darboux Transformations: The Geometry of Solitons, Halifax, Nova Scotia, Canada, Jun 4-9,
