Volume 14, Issue 51, April 2019, Pages 513-527
M Samy Hefny,; A Taher Hussein,; A Mostafa Hamed; N A Mahmoud
Volume 14, Issue 50, January 2019, Pages 87-98
Alaa Ismail; Abd-Allah El-Marhoumy; A M Hamed; A M T. A. Eldein Hussin