A. Malek and M. Hachemi
American Journal of Applied Sciences 5 ( 10 ): 1329 - 1335 , 2008
H. Navidi, A. Malek and P. Khosravi
Journal of Applied Sciences 9 ( 18 ): 3402 - 3406 , 2009
A.H. Taher and A. Malek
Journal of Applied Sciences 9 ( 23 ): 4174 - 4178 , 2009