Volume 21, Issue 1, March 1996, Pages 33-45
Ibraheem Mohamed Ibraheem Elewa Amar; Ahmed Abd El-Hamed Ahmed Abd El-Shafi; K. A. Kamal
Volume 18, Issue 1, March 1993, Pages 35-40
Ahmed Abd El-Hamed Ahmed Abd El-Shafi; Syed Naqvi