Volume 50, Issue 1, March 2019, Pages 41-49
Mohamed M. Gad
Volume 39, Issue 4, December 2008, Pages 71-80
Kh. A. El-Rouby; H. A. AbdelKareem; A. B. Kamel
Volume 37, Issue 3, October 2006, Pages 1-11
Ehab S. Boshra