Volume 18, Issue 170.169, November 2015, Pages 12-20
10.22038/ijogi.2015.6131
Forouzan Sharifipour; Azam Bakhteh; Mandana Mirmohammad Ali
Volume 15, Issue 4, January 2012, Pages 12-17
10.22038/ijogi.2012.5730
Mehri Rashidi; Azam Bakhteh; Jafar Nasouhi