Volume 34, Issue 2, April 2011, Pages 149-153
M. A. O. Shehata; A. Abd Elmotalip
Volume 33, Issue 3, July 2010, Pages 245-250
G. A. Z. Mousa; A. Abd Elmotalip; Gamal H. Moustafa
Volume 32, Issue 2, April 2009, Pages 109-117
A. Abd Elmotalip; G. A. Z. Mousa