Volume 45.1, Issue 89, April 2001, Pages 222-238
A.A. Abdel Aal; M.W. Ghatas; G.A. Badawy
Volume 44.2, Issue 88, January 2001, Pages 215-231
A.A. Abdel Aal; G.A. Badawy; M.W. Gattas
Volume 41.1, Issue 81, April 1999, Pages 141-152
A.A. Abdel Aal; A.M. Abou-Eisha; M.N. El-Sheary