Volume 21, Issue 1, March 2011, Pages 15-21
U. M. Abd El-Monem; M. A. Kandeil
Volume 19, Issue 1, March 2009, Pages 51-56
M. A. Mohammad
Volume 18, Issue 1, March 2008, Pages 151-158
A. E. Ahmed; H. Y. Abdel-Hamid; A. A. Abdel-Rahim; M. N. Ismail