Volume 20, Issue 1, June 1997, Pages 75-85
Hassan F. Askal
Volume 17, Issue 1, July 1994, Pages 65-71
Gamal A. Saleh; Hassan F. Askal; Osama H. Abdelmageed; Ibrahim H. Refaat
Volume 17, Issue 1, July 1994, Pages 87-94
Ibrahim H. Refaat; Osama H. Abdelmageed; Hassan F. Askal; Gamal A. Saleh