Volume 22, Issue 12, February 2020, Pages 19-23
10.22038/ijogi.2020.15549
Shahnaz Nezamdoust; Farahnaz Farzaneh
Volume 11, Issue 2, July 2008, Pages 1-6
10.22038/ijogi.2008.5925
Mahtab Zeynalzadeh; Zahra Basirat