Volume 26, Issue 1, March 2018, Pages 215-223
A. I. Gomaa; M M Hegazi; Kh. F. El-Bagoury; Kh. M. Youssef
Volume 14, Issue 2, September 2006, Pages 723-740
El-Sawy, A. A.; A. Reda; A. Gomaa; Nansy Danial