Volume 31, Issue 1, March 2006, Pages 28-33
M. ATTIA; Mahmoud Mohamed El-Gamal
Volume 26, Issue 2, June 2001, Pages 73-85
Mahmoud Mohamed Abd El-Aziz Ahmed El-Gamal
Volume 23, Issue 1, March 1998, Pages 1-16
Mahmoud Mohamed Abd El-Aziz El-Gamal; A. R. Zidan; Mohamed Gamal Mohamed Abd Alla; R. Baker