Zhengdong Zhu, Yanping Chen, Ronggui Lan and Zengzhi Li
Information Technology Journal 8 ( 6 ): 903 - 909 , 2009
Yanping Chen, Jatinder N.D. Gupta and Jie Zhang
Journal of Applied Sciences 13 ( 7 ): 1149 - 1154 , 2013