Volume 17, Issue 2, December 2019, Pages 135-146
Asmaa S. Salma; Marwa Ali Abdelwahab
Volume 11, Issue 3, 2014, Pages 49-58
Tamer Hamdy Ayad; Ali El sayed Shehata
Volume 11, Issue 3, 2014, Pages 91-114
Gamal Khalifa; Elhessien Ali