Volume 23, Issue 4, October 2000, Pages 15-31
F.E. Abdel-kader; A.E. Abou Mobarka; W.S. Abouel-fadl
Volume 23, Issue 2, April 2000, Pages 231-246
F.E. Abdel-kader; A.E. Abou Mobarka; W.S. Abouel-fadi