Volume 55, Issue 121, April 2009, Pages 1-12
R.A. AZZAM; A.M. EL-GAMAL; M.T. ELSHEEMY
Volume 36.2, Issue 72, January 1997, Pages 215-221
A.M. AL-ASHMAWY; A.M. EL-GAMAL; A. EL-KHALEK
Volume 36.1, Issue 71, October 1996, Pages 117-124
A.M. AL-ASHMAWY; A.A. EL-EBEEDY; A.M. EL-GAMAL; SH. M. YOUSSEF