Volume 2010, Issue 12, November and December 2010, Pages 275-286
E. A. EL-ALFI; A. G . OTHMAN; A. M. HASSAN; M. E. SARAYA; R. R. ABD EL-GAYED
Volume 2008, Issue 6, May and June 2008, Pages 67-90
A. Y. HASSAN; F. M. FAYZ
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