Douglas H. Fisher Mary E. Edgerton Zhihua Chen Lianhong Tang Lewis Frey Backward chaining rule induction. 397-417 2006 10 Intell. Data Anal. 5 http://iospress.metapress.com/openurl.asp?genre=article&issn=1088-467X&volume=10&issue=5&spage=397 db/journals/ida/ida10.html#FisherECTF06