Antonio De Nicola 0001 Michele Missikoff Federica Schiappelli Towards an Ontological Support for eLearning Courses. 773-777 http://dx.doi.org/10.1007/978-3-540-30470-8_90 2004 conf/otm/2004 OTM Workshops db/conf/otm/otm2004.html#NicolaMS04