Szukana fraza: [Opis = "W\: N. Zhong, A. Skowron, and S. Ohsuga, editors, Proceedings of the 7th International Workshop on rough Sets, Fuzzy Sets, Data Mining and Granular\-Soft Computing \(RSFSGrC 99\) Ube\-Yamaguchi, Japan, November 9\-11, 1999, volume 1711 of Lecture Notes in Artificial Intelligence, pages 1\-9, Berlin, Germany, 1999. Springer\-Verlag"]
