Guo Qiuping, Tian Cunzhi and Xia ZiXiang
Information Technology Journal 12 ( 14 ): 2838 - 2844 , 2013
Guo Qiuping, Tian Cunzhi and Li Jiangqi
Journal of Applied Sciences 13 ( 13 ): 2457 - 2462 , 2013