Fausto Giunchiglia Pavel Shvaiko Mikalai Yatskevich S-Match: an Algorithm and an Implementation of Semantic Matching. 61-75 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3053&spage=61 2004 conf/esws/2004 ESWS db/conf/esws/esws2004.html#GiunchigliaSY04