Yu, H., Pedrincaci, C., Dietze, S., Domingue, und J.. IEEE Transactions on Learning Technology, Special Issue on Semantic Technologies for Learning and Teaching Support in Higher Education, (2012)
T. Tezuka, R. Lee, Y. Kambayashi, und H. Takakura. Proceedings of the Second International Conference on Web Information Systems Engineering, 2, Seite 14--21. (Dezember 2001)
Q. Zhao, S. Hoi, T. Liu, S. Bhowmick, M. Lyu, und W. Ma. WWW '06: Proceedings of the 15th international conference on World Wide Web, Seite 543--552. New York, NY, USA, ACM, (2006)