Ricardo Landa Becerra Carlos A. Coello Coello A Cultural Algorithm with Differential Evolution to Solve Constrained Optimization Problems. 881-890 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3315&spage=881 2004 conf/iberamia/2004 IBERAMIA db/conf/iberamia/iberamia2004.html#BecerraC04