Volume 49, Issue 9, September 2020, Pages 181-216
E. H. El-Samaan Rana; S. Ahmed Gamal; A. Khater Abd El-Nabi
Volume 49, Issue 7, July 2020, Pages 73-102
M. Abdel Rahman Hemat; S. Ahmed Gamal; A. El- Kholy Gamal; F. Hany Ahmed