A.Y. Elatta, Li Pei Gen, Fan Liang Zhi, Yu Daoyuan and Luo Fei
Information Technology Journal 3 ( 1 ): 74 - 78 , 2004
A.Y. Elatta, Fan Liang Zhi and Li Xiao Ping
Journal of Applied Sciences 4 ( 2 ): 214 - 224 , 2004