Vipul Kashyap Alexander Borgida Representing the UMLS Semantic Network Using OWL: (Or "What's in a Semantic Web Link?"). 1-16 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2870&spage=1 2003 conf/semweb/2003 International Semantic Web Conference db/conf/semweb/iswc2003.html#KashyapB03