Volume 20, Issue 2, June 1995, Pages 29-40
Fatma Alzahraa Mohamed Rashed Abou Chadi; F. M. Ahmed; M. A. E. Abou El-Soud
Volume 5, Issue 1, June 1980, Pages 89-100
Mahmoud Saber Ahmed Kandil; F. I. Ahmed; H. H. El-Tamally