Volume 49, Issue 97, April 2003, Pages 88-112
M.M. Ahmed; S.A. Sotohy
Volume 46.1, Issue 91, October 2001, Pages 34-47
M.M. Ahmed; M.A. Abdel-Rahman; Ibtisam M.H. El-Mileegy
Volume 45.1, Issue 89, April 2001, Pages 15-36
M.A. Abdel-Rahman; M.M. Ahmed
Volume 43.1, Issue 85, April 2000, Pages 37-50
M.A. Abdel-Rahman; M.M. Ahmed; S.A. Sotohy
Volume 38.2, Issue 76, January 1998, Pages 16-28
M.M. Ahmed; S.A. Sotohy