Volume 23, Issue 4, July and August 2017, Pages 1-13
Yasser Ghanem; Khalid Fahmy; Doaa Refaat; Moustafa mouhammed
Volume 19, Issue 6, November and December 2013, Pages 1-8
Hatem Gaafar; Mohamed Hefny; Doaa Refaat; Abd Elrahman Metwalli
Volume 19, Issue 5, September and October 2013, Pages 1-8
Hatem Gaafar; Mohamed Hefny; Doaa Refaat; Abd Elrahman Metwalli