Xiao Huang Qiang Xue Jun Yang TupleRank and Implicit Relationship Discovery in Relational Databases. 445-457 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2762&spage=445 2003 conf/waim/2003 WAIM db/conf/waim/waim2003.html#HuangXY03