Karin Koogan Breitman Aluízio Haendchen Filho Edward Hermann Haeusler Arndt von Staa Using Ontologies to Formalize Services Specifications in Multi-agent Systems. 92-110 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3228&spage=92 2004 conf/faabs/2004 FAABS db/conf/faabs/faabs2004.html#BreitmanFHS04