Volume 46.2, Issue 92, January 2002, Pages 249-261
A.E. Abdel-Ghaffar; M.E.A. Abou-El-Roos
Volume 43.2, Issue 86, July 2000, Pages 327-337
M.E.A. Abou-El-Roos; A.E. Abdel Ghaffar
Volume 42.2, Issue 84, January 2000, Pages 297-309
M.E.A. Abou-El-Roos; H.M. El-Maghraby
Volume 42.2, Issue 84, January 2000, Pages 310-327
M.E.A. Abou-El-Roos; A.E. Abdel-Ghaffar