Shuqin Zhang Dongxin Lu Yongtian Yang A Fuzzy Set Based Trust and Reputation Model in P2P Networks. 211-217 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3177&spage=211 2004 conf/ideal/2004 IDEAL db/conf/ideal/ideal2004.html#ZhangLY04