Paolo Massa Bobby Bhattacharjee Using Trust in Recommender Systems: An Experimental Analysis. 221-235 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2995&spage=221 2004 conf/itrust/2004 iTrust db/conf/itrust/itrust2004.html#MassaB04