Klaus Fischer Michael Schillo Jörg H. Siekmann Holonic Multiagent Systems: A Foundation for the Organisation of Multiagent Systems. 71-80 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2744&spage=71 2003 conf/holomas/2003 HoloMAS db/conf/holomas/holomas2003.html#FischerSS03