Volume 60, Issue 142, July 2014, Pages 172-178
EL-BADRY, D.A.; AML Z. LEIL; MONA H. SHAKER
Volume 40.2, Issue 80, January 1999, Pages 292-309
K.E. El-Ekhnawy; A.M. Otteifa; Omaima H. Ezzo; M.A. Hegazy