Gerd Wagner Florin Tulba Agent-Oriented Modeling and Agent-Based Simulation. 205-216 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2814&spage=205 2003 conf/er/2003w ER (Workshops) db/conf/er/erw2003.html#WagnerT03