Emmanuel Sapin Olivier Bailleux Jean-Jacques Chabrier Research of Complex Forms in Cellular Automata by Evolutionary Algorithms. 357-367 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2936&spage=357 2003 conf/ae/2003 Artificial Evolution db/conf/ae/ae2003.html#SapinBC03