Liming Chen Nigel Shadbolt Carole A. Goble Feng Tao Simon J. Cox Colin Puleston Paul R. Smart Towards a Knowledge-Based Approach to Semantic Service Composition. 319-334 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2870&spage=319 2003 conf/semweb/2003 International Semantic Web Conference db/conf/semweb/iswc2003.html#ChenSGTCPS03