Volume 13, Issue 1, January 2009, Pages 33-40
Mohamed Eltotongy; Mohamed El-Negeri; Tarek Shokeir; Mohamed Fawzy; Abdel Megied Mashally
Volume 8, Issue 2, May 2004, Pages 23-38
Hesham Shalan; Mohamed El-Shafei,; Mohamed El-Negery; Kamal Anwar; Tarek Shokeir; Salwa Gawish