Volume 55, Issue 122, July 2009, Pages 1-10
G.A. MEGAHED; D.R. DERAR; H.A. HUSSEIN; A.L.E. MOHMOUD
Volume 54, Issue 119, October 2008, Pages 1-20
A.A. ABDEL-RAHMAN; D.R. DERAR; E.M. MAGDY
Volume 53, Issue 112, January 2007, Pages 292-312
A.A. ABD-EL-RAHMAN; D.R. IBRAHIM