Shanshan Song Kai Hwang Mikin Macwan Fuzzy Trust Integration for Security Enforcement in Grid Computing. 9-21 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3222&spage=9 2004 conf/npc/2004 NPC db/conf/npc/npc2004.html#SongHM04