Joachim Hereth Correia Gerd Stumme Rudolf Wille Uta Wille Conceptual Knowledge Discovery - A Human-Centered Approach. 281-302 2003 17 Applied Artificial Intelligence 3 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=17&issue=3&spage=281 db/journals/aai/aai17.html#CorreiaSWW03