Knowledge representation systems, logical kits, and contextsWIWEGER, A.Bulletin of the Polish Academy of Sciences. Mathematics. 1988, Vol 36, Num 3-4, pp 99-111, issn 0239-7269Article

On topological rough setsWIWEGER, A.Bulletin of the Polish Academy of Sciences. Mathematics. 1989, Vol 37, Num 1-6, pp 89-93, issn 0239-7269Article

On equilibrium situations of abstract gamesWIWEGER, A; PAWLAK, Z.Bulletin of the Polish academy of sciences. Mathematics. 1984, Vol 32, Num 5-6, pp 261-265Article