D. Dhillon, T. Randhawa, M. Wang, and L. Lamont. Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE, 2, page 682 - 688 Vol.2. (March 2004)
F. Hong, L. Hong, and C. Fu. Advanced Information Networking and Applications, 2005. AINA 2005. 19th International Conference on, 1, page 713--718. IEEE, (2005)