Volume 58, Issue 132, January 2012, Pages 1-15
H.A. SHALABY; S.A. TAWFIK; AZZA A.A. HASSAN
Volume 53, Issue 114, July 2007, Pages 1-12
A.H. MOUSTAFA; M. EL-SAYED HATAB; M.M. ABD-EL-LATIF