Volume 34, Issue 4, October 2011, Pages 345-351
R. A. Amer; G. A. Morsy; H. A. Yassin
Volume 34, Issue 3, July 2011, Pages 267-273
G. A. Morsy; R. A. Amer; H. A. Yassin
Volume 27, Issue 1, January 2004, Pages 25-29
A. A. Nour Eldeen; Ahmed H. Elassal