Volume 6, Issue 2, October 2008, Pages 254-273
Ismail Ismail El-Kon; El-Sayed Mohammed Fattouh; Samy Anwer Darwish; Fady samir Farag
Volume 4, Issue 2, October 2006, Pages 1-18
Ismail I. El-Kon; M.A. Harfoosh