Volume 31, Issue 1, March 2012, Pages 81-87
10.30492/ijcce.2012.6078
Seied Hossein Ghiassi; Ali Akbar Safekordi; Fatemeh Babazadeh Shareh
Volume 26, Issue 2, June 2007, Pages 85-96
10.30492/ijcce.2007.7657
Mahmoud Gorji; Ramin Bozorgmehry Boozarjomehry; Mohammad Kazemeini