Toward a Generalization of Rough Sets Based on Active and Passive Relations.

Masashi Emoto Rolly Intan Masao Mukaidono Toward a Generalization of Rough Sets Based on Active and Passive Relations. 939-945 2006 10 JACIII 6 http://www.fujipress.jp/finder/xslt.php?mode=present&inputfile=JACII001000060016.xml db/journals/jaciii/jaciii10.html#EmotoIM06