Szukana fraza: [Opis = "W\: Electronic Notes in Theoretical Computer Science, 82\(4\)\:1\-9, 2003. \(A. Skowron and M. Szczuka \(ed.\), Proceedings of the International Workshop on Rough Sets in Knowledge Discovery and Soft Computing at ETAPS 2003, Warsaw, Poland, April 12\-13\)"]
