Volume 60, Issue 142, July 2014, Pages 160-171
DIEFY SALEM; AHMED A. SHARKAWY; MANAL M. SAYED; SHEHATA, O.A.
Volume 55, Issue 123, October 2009, Pages 1-16
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Volume 38.2, Issue 76, January 1998, Pages 151-160
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Volume 35.1, Issue 69, April 1996, Pages 42-63
Mamdouh M. ANWAR; G.A. MEGAHED; THORYA S. EI-DEEB; H.S. SHEHATA