Keiji Suzuki Effects of Conflict between Emergent Charging Agents in Social Dilemma. 120-136 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3012&spage=120 2003 conf/mamus/2003 MAMUS db/conf/mamus/mamus2003.html#Suzuki03