Naouel Karam Serge Linckels Christoph Meinel Semantic Composition of Lecture Subparts for a Personalized e-Learning. 716-728 2007 conf/esws/2007 ESWC http://dx.doi.org/10.1007/978-3-540-72667-8_50 db/conf/esws/eswc2007.html#KaramLM07