T. Wang, X. Zhou, W. Zhang, and J. Wei. Proceedings of the Second Asia-Pacific Symposium on Internetware, page 18:1--18:4. New York, NY, USA, ACM, (2010)
X. Wang, B. Wang, and J. Huang. Computer Science and Automation Engineering (CSAE), 2011 IEEE International Conference on, 2, page 404 -410. (June 2011)