Volume 43, Issue 1, September 2018, Pages 539-570
Ghobashi, A. R; Abdel Wahed, F. Z; Helal, A. M
Volume 32, Issue 1, March 2016, Pages 1-23
Abuo El-Kheir, W. S; Ibrahim, E.A; Abd El-Razek, A. B; Helal, A. M