Volume 35, Issue 1, January 2012, Pages 25-31
Samia M. Mahmoud; M. Z. Elsherif; Hassan A. Mansour; Emad S. Abdel-Aliem
Volume 34, Issue 3, July 2011, Pages 225-231
Ibrahim A. M. Abdel-Halim; M. Z. Elsherif; Mohamed M. Fathy