Liana Razmerita Sophia Antipolis Guy Gouardères Emilie Conté Mansour Saber Ontology based user modeling for personalization of grid learning services. 2005 conf/elegi/2005 ELeGI Conference http://ewic.bcs.org/conferences/2005/1stelegi/session1/paper10.htm db/conf/elegi/elegi2005.html#RazmeritaAGCM05