S. Zhang, and S. Goddard. International Conference on Information Technology: Coding and Computing, 2005. ITCC 2005, 2, page 443-- 448 Vol. 2. IEEE, (April 2005)
X. Yang, L. Liu, N. Vaidya, and F. Zhao. The First Annual International Conference on Mobile and Ubiquitous
Systems: Networking and Services (MOBIQUITOUS), page 114 - 123. (August 2004)