Tea Robic Bogdan Filipic DEMO: Differential Evolution for Multiobjective Optimization. 520-533 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3410&spage=520 2005 conf/emo/2005 EMO db/conf/emo/emo2005.html#RobicF05