Volume 42, Issue 3, September 2017, Pages 7-12
Mahmoud Abd El-shafy Elsheikh; Hany Samir Guirguis; Abd EL-rahman Fathy Amer
Volume 36, Issue 2, June 2011, Pages 1-5
I. G. Rashed; A. Al-Sarawy; M. El-Halwany; B. Abd El-Rahman