C. Blackwell. Proceedings of the 5th Annual Workshop on Cyber Security and Information Intelligence Research: Cyber Security and Information Intelligence Challenges and Strategies, page 45:1--45:4. New York, NY, USA, ACM, (2009)
K. Brancik, and G. Ghinita. Proceedings of the first ACM conference on Data and application security and privacy, page 231--236. New York, NY, USA, ACM, (2011)