Elvis Wai Chung Leung Qing Li A Dynamic Conceptual Network Mechanism for Personalized Study Plan Generation. 69-80 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2783&spage=69 2003 conf/icwl/2003 ICWL db/conf/icwl/icwl2003.html#LeungL03