Stepaniuk, Wojciech Ziarko and Yiyu Yao.

Rough Set Theory: Ontological Systems, Entailment Relations and Approximation Operators.- Information Entropy and Granulation Co-Entropy of Partitions and Coverings: A Summary.- Lattices with Interior and Closure Operators and Abstract Approximation Spaces.- Rough Approximation Based on Weak q-RIFs.- Rough Geometry and Its Applications in Character Recognition.- Extensions of Information Systems: The Rough Set Perspective.- Intangible Assets in a Polish Telecommunication Sector - Rough Sets Approach.- Multicriteria Attractiveness Evaluation of Decision and Association Rules.