Volume 34, Issue 4, October 2011, Pages 385-391
Yasser A. El-Hakem; Yehia B. M. Heza
Volume 33, Issue 4, October 2010, Pages 419-430
Y. B. M. Heza
Volume 33, Issue 4, October 2010, Pages 441-446
Nagwa Ragab El-sakhawy; Ahmed Abd El_Latief