Volume 15, Issue 10, April 2012, Pages 8-13
10.22038/ijogi.2012.5703
Zahra Shahshahan; Nushin Hoseini
Volume 11, Issue 2, July 2008, Pages 49-53
10.22038/ijogi.2008.5930
Zahra Shahshahan; Niloufar Farajizadeh; Mojdeh Ghasemi