Guoyin Wang Tian-rui Li Jerzy W. Grzymala-Busse Duoqian Miao Andrzej Skowron Yiyu Yao Rough Sets and Knowledge Technology, Third International Conference, RSKT 2008, Chengdu, China, May 17-19, 2008. Proceedings 5009 2008 978-3-540-79720-3 RSKT Lecture Notes in Computer Science Springer db/conf/rskt/rskt2008.html