E. Horvát, and K. Zweig. Proceedings of the 2012 International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2012), page 599--606. IEEE Computer Society, (2012)
N. Du, B. Wang, B. Wu, and Y. Wang. Proceedings of the 2008 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology-Volume 01, page 176--179. IEEE Computer Society, (2008)