Volume 6, Issue 1, January 2013, Pages 41-46
Yasser Hussein; Abd Elwahhab M Hamed; Wael Shelfa; Hasan Awad
Volume 5, Issue 3, October 2012, Pages 613-620
Awny A El-Zeftawy; Mohamed Al-Sayed; Mansour M Morsy; Wael Shelfa
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