Volume 42, Issue 3, September 2017, Pages 7-12
Mahmoud Abd El-shafy Elsheikh; Hany Samir Guirguis; Abd EL-rahman Fathy Amer
Volume 35, Issue 1, March 2010, Pages 55-66
Mahmoud Abd El-Shafy Elsheikh; Hazem I. Saleh; Diaa El Quosy; Abdallah A. Mahmoud