Jelena Jovanovic Dragan Gasevic Vladan Devedzic Ontology-Based Automatic Annotation of Learning Content. 91-119 2006 2 Int. J. Semantic Web Inf. Syst. 2 http://www.igi-pub.com/articles/details.asp?ID=6224 db/journals/ijswis/ijswis2.html#JovanovicGD06