Julien Velcin Jean-Gabriel Ganascia Modeling Default Induction with Conceptual Structures. 83-95 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3288&spage=83 2004 conf/er/2004 ER db/conf/er/er2004.html#VelcinG04