David Maulsby Ian H. Witten Cima: An Interactive Concept Learning System for End-User Applications. 653-671 1997 11 Applied Artificial Intelligence 7-8 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=11&issue=7&spage=653 db/journals/aai/aai11.html#MaulsbyW97