Volume 26, Special issue (2C), May 2018, Pages 1993-2000
A.F., Badr; A.M. Hekal; L.A. Youssef
Volume 17, Issue 1, March 2009, Pages 185-192
L.A. Youssef; M.S . Abdel-Wahaed; A.S. Kassab; M.M.E. Saleh