Rakesh Agrawal Jerry Kiernan Ramakrishnan Srikant Yirong Xu An Implementation of P3P Using Database Technology. 845-847 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2992&spage=845 2004 conf/edbt/2004 EDBT db/conf/edbt/edbt2004.html#AgrawalKSX04