Vicent Estruch César Ferri José Hernández-Orallo M. José Ramírez-Quintana 41-51 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3077&spage=41 2004 conf/mcs/2004 Multiple Classifier Systems db/conf/mcs/mcs2004.html#EstruchFHR04