Volume 13, Issue 1, June 2004, Pages 29-35
Osama El-Sabbagh
Volume 9, Issue 1, June 2000, Pages 9-16
Osama El-Sabbagh; Abd-El Alim Abd-El Alim
Volume 7, Issue 2, December 1998, Pages 80-85
Sobhy EI-Adl; Mohamed Baraka; Osama El-Sabbagh