Computing Preferred Answer Sets in Answer Set Programming.

Toshiko Wakaki Katsumi Inoue Chiaki Sakama Katsumi Nitta Computing Preferred Answer Sets in Answer Set Programming. 259-273 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2850&spage=259 2003 conf/lpar/2003 LPAR db/conf/lpar/lpar2003.html#WakakiISN03