Journal of Applied Sciences 13 ( 9 ): 1642 - 1646 , 2013
Xie Fenghua, Zhai Xiaoye and Yao Yuqing
Journal of Applied Sciences 13 ( 9 ): 1661 - 1664 , 2013
Lu Penghu, Xie Fenghua and Zhai Xiaoye
Journal of Applied Sciences 13 ( 12 ): 2252 - 2257 , 2013