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
Volume 22, Issue 3, October 1999, Pages 87-102
F.E Abdel-kader; A.E. Abou Mobarka; W.S. Abouel-Fadl