Helmut Meisel Ernesto Compatangelo Andreas Hörfurter An Ontology-Based Approach to Intelligent Instructional Design Support. 898-905 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2773&spage=898 2003 conf/kes/2003-1 KES db/conf/kes/kes2003-1.html#MeiselCH03