S. Nesic, D. Gasevic, and M. Jazyeri. Proceedings of the 8th international Conference on Advanced Learning Technologies, page 751-755. IEEE Computer Society, (2008)
S. Nešić, D. Gašević, and M. Jazayeri. 7th IEEE International Conference on Advanced Learning Technologies, Niiagata, Japan, IEEE Computer Society, (2007)To appear.