Volume 25, Issue 2, June 2000, Pages 46-58
Mohamed Nabil Saad El-Din Sabry; W. Fikry; Kh. Abdel Salam; Mohamed Mahmoud Moustafa Awad; A. I. Nasser
Volume 13, Issue 1, June 1988, Pages 1-11
S. Darweech; A. Ramadan; A. M. Nasser