Robert J. Ross Rem W. Collier Gregory M. P. O'Hare AF-APL - Bridging Principles and Practice in Agent Oriented Languages. 66-88 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3346&spage=66 2004 conf/promas/2004 PROMAS db/conf/promas/promas2004.html#RossCO04