• On Irreducible Descriptive Sets of Attributes for Information Systems Mikhail Moshkov, Andrzej Skowron, Zbigniew Suraj • Dominance-Based Rough Set Approach and Bipolar Abstract Rough Approximation Spaces Salvatore Greco, Benedetto Matarazzo, Roman Słowinski • Paraconsistent Logic Programs with FourValued Rough Sets Jan Małuszynski, Andrzej Szałas, Aida Vitória • An Equivalent Definition of Ro...