Volume 46.1, Issue 91, October 2001, Pages 109-122
A.M. Sayed; M.M. Abdel-Hafeez; A-El-R., Thabet; A.F. Bastawros
Volume 42.1, Issue 83, October 1999, Pages 89-112
M. Mubarak; A.F. Bastawrows; M.M. Abdel-Hafeez; M.M. Ali