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E. Y. Chen, Detecting DoS attacks on SIP systems, 1st IEEE Workshop on VoIP Management and Security, 2006., pp.53-58, 2006.
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S. Ehlert, C. Wang, T. Magedanz, and D. Sisalem, Specification-based denial-ofservice detection for SIP Voice-over-IP networks, The Third International Conference on Internet Monitoring and Protection (ICIMP), pp.59-66, 2008.

G. Zhang, S. Ehlert, T. Magedanz, and D. Sisalem, Denial of service attack and prevention on SIP VoIP infrastructures using DNS flooding, Proceedings of the 1st international conference on Principles, systems and applications of IP telecommunications, IPTComm '07, pp.57-66, 2007.
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H. Sengar, H. Wang, D. Wijesekera, and S. Jajodia, Detecting VoIP Floods Using the Hellinger Distance, IEEE Transactions on Parallel and Distributed Systems, vol.19, issue.6, pp.794-805, 2008.
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H. Kang, Z. Zhang, S. Ranjan, and A. Nucci, SIP-based VoIP traffic behavior profiling and its applications, Proceedings of the 3rd annual ACM workshop on Mining network data , MineNet '07, pp.39-44, 2007.
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M. Nassar, R. State, and O. Festor, Monitoring SIP Traffic Using Support Vector Machines, Proceedings of the 11th International Symposium on Recent Advances in Intrusion Detection (RAID '08), pp.311-330, 2008.
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