M. Mosa and Zhu Yuqun
Information Technology Journal 1 ( 1 ): 62 - 68 , 2002
A. Yattara, Zhu Yuqun and M. Mosa
Information Technology Journal 1 ( 3 ): 283 - 288 , 2002
Information Technology Journal 1 ( 3 ): 289 - 293 , 2002