Volume 14, Issue 8, February 2012, Pages 48-54
10.22038/ijogi.2012.5753
Nasrin Fazel; Masoumeh Hashemian; Mohammad Ramezani; Arash Akaberi
Volume 11, Issue 4, December 2009, Pages 23-29
10.22038/ijogi.2008.5908
Nasrin Fazel; Habib Allah Esmaeili