Rough Sets and Current Trends in Computing : 8th International Conference, RSCTC 2012, Chengdu, China, August 17-20, 2012.Proceedings - JingTao Yao, Yan Yang, Roman S.owi.ski, Salvatore Greco, Huaxiong Li, Sushmita Mitra, Lech Polkowski ((Lecture Notes in Computer Science))