Andrzej Skowron, Jaroslaw Stepaniuk, James F. Peters. Approximation of Information Granule Sets. In Wojciech Ziarko, Y. Y. Yao, editors, Rough Sets and Current Trends in Computing, Second International Conference, RSCTC 2000 Banff, Canada, October 16-19, 2000, Revised Papers. Volume 2005 of Lecture Notes in Computer Science, pages 65-72, Springer, 2000. [doi]
Abstract is missing.