Volume 51, Issue 1, March 2020, Pages 1-25
Mussad Zaki El-Hefny; Kamal Abdu Abdel-Ghani Khair Allah; Kh. A.M. Ibrahim; K. A. M.; M. B. Ali
Volume 41, Issue 1, March 2010, Pages 1-27
Mussad Zaki El-Hefny; El-Said A. Hassaballa; Magdi Abd El-Moula; Khaled A. M. Ibrahim