Jelena Jovanovic Dragan Gasevic Christopher A. Brooks Timmy Eap Vladan Devedzic Marek Hatala Griff Richards Leveraging the Semantic Web for Providing Educational Feedback. 551-555 2007 conf/icalt/2007 ICALT http://doi.ieeecomputersociety.org/10.1109/ICALT.2007.178 db/conf/icalt/icalt2007.html#JovanovicGBEDHR07