Volume 57, Issue 131, October 2011, Pages 1-12
MARCEL F. GALAB; AMAL A.MEGAHED; ABEER S.ABDU-ELRAHMAN
Volume 55, Issue 122, July 2009, Pages 1-8
MARCEL F. GALAB
Volume 54, Issue 119, October 2008, Pages 1-12
AMANY M. SHALABY; MARCEL F. GALAB