Volume 20.1, Issue 39, May 1988, Pages 131-135
M. ISMAIL; S. EL-MAGAWRY; L.A. IBRAHIM; A.A. EL-GHANAM
Volume 12.1, Issue 23, May 1984, Pages 98-106
M.T. SHOUMAN; M. ISMAIL; S.SH. REZK