Seung-Ryong Yang Sung-Bae Cho Evolutionary Learning of Multiagents Using Strategic Coalition in the IPD Game. 50-61 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2891&spage=50 2003 conf/prima/2003 PRIMA db/conf/prima/prima2003.html#YangC03