Jerzy Stefanowski An Empirical Study of Using Rule Induction and Rough Sets to Software Cost Estimation. 63-82 2006 71 Fundam. Inform. 1 http://iospress.metapress.com/openurl.asp?genre=article&issn=0169-2968&volume=71&issue=1&spage=63 db/journals/fuin/fuin71.html#Stefanowski06