Ricardo Barandela José Salvador Sánchez Vicente García Francesc J. Ferri Learning from Imbalanced Sets through Resampling and Weighting. 80-88 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2652&spage=80 2003 conf/ibpria/2003 IbPRIA db/conf/ibpria/ibpria2003.html#BarandelaSGF03