E. Shirani and H. Nasibi
Journal of Applied Sciences 1 ( 3 ): 275 - 282 , 2001
E. Shirani and K. Daneshkhah
Journal of Applied Sciences 2 ( 10 ): 955 - 964 , 2002
H. Ahmadikia and E. Shirani
Journal of Applied Sciences 4 ( 1 ): 110 - 117 , 2004