Rough Sets and Current Trends in Computing 5th International Conference, RSCTC 2006, Kobe, Japan, November 6-8, 2006, Proceedings - Greco, Salavatore; Hata, Yukata; Hirano, Shoji; Inuiguchi, Masahiro; Miyamoto, Sadaaki; Nguyen, Hung Son; Slowiński, Roman (Lecture Notes in Artificial Intelligence, 2006)