Nicola Fanizzi Floriana Esposito Stefano Ferilli Giovanni Semeraro A Methodology for the Induction of Ontological Knowledge from Semantic Annotations. 65-77 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2829&spage=65 2003 conf/aiia/2003 AI*IA db/conf/aiia/aiia2003.html#FanizziEFS03