M. Davoodi, M.A. Sakhi and M.K. Jafari
Asian Journal of Applied Sciences 2 ( 1 ): 36 - 49 , 2009
A. Shafiee, H.R. Tavakoli and M.K. Jafari
Journal of Applied Sciences 8 ( 18 ): 3108 - 3118 , 2008