Ulrich Endriss Nicolas Maudet Fariba Sadri Francesca Toni Logic-Based Agent Communication Protocols. 91-107 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2922&spage=91 2003 conf/agentCL/2003 Workshop on Agent Communication Languages db/conf/agentCL/acl2003.html#EndrissMST03