Xiaolong Xie, Xinsheng Ji, Caixia Liu. Analysis of Abnormal Events in IMS and Research on the Strategy of Detection. In Yuping Wang, Yiu-ming Cheung, Ping Guo, Yingbin Wei, editors, Seventh International Conference on Computational Intelligence and Security, CIS 2011, Sanya, Hainan, China, December 3-4, 2011. pages 712-716, IEEE, 2011. [doi]