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M. Thein, and M. Thwin. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), volume 2 of IFIP Advances in Information and Communication Technology, page 13-32. Springer, (December 2012)
E. Demidova, X. Zhou, and W. Nejdl. Proceedings of the 21st international conference companion on World Wide Web, page 325--328. New York, NY, USA, ACM, (2012)