Ronald Ashri Grit Denker Darren Marvin Mike Surridge Terry R. Payne Semantic Web Service Interaction Protocols: An Ontological Approach. 304-319 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3298&spage=304 2004 conf/semweb/2004 International Semantic Web Conference db/conf/semweb/iswc2004.html#AshriDMSP04