Y. Duan, C. Cruz, A. Elfaki, Y. Bai, and W. Du. Computer and Information Science, volume 493 of Studies in Computational Intelligence, page 267-278. Springer International Publishing Switzerland, (2013)
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)