Volume 64, Issue 156, January 2018, Pages 64-68
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Volume 58, Issue 135, October 2012, Pages 79-87
SHERIEF M.S. ABD-ALLAH; H.A.A. ISMAIL
Volume 57, Issue 130, July 2011, Pages 1-22
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Volume 32.1, Issue 63, October 1994, Pages 121-118
M.A. YASSIEN; M.E. ABD EL FATTAH