Markus Köster Adolf Grauel Georg Klene Harold J. Convey A New Paradigm of Optimisation by Using Artificial Immune Reactions. 287-292 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2773&spage=287 2003 conf/kes/2003-1 KES db/conf/kes/kes2003-1.html#KosterGKC03