YongSeog Kim W. Nick Street Filippo Menczer Evolutionary model selection in unsupervised learning. 531-556 2002 6 Intell. Data Anal. 6 http://iospress.metapress.com/openurl.asp?genre=article&issn=1088-467X&volume=6&issue=6&spage=531 db/journals/ida/ida6.html#KimSM02