Volume 33.2, Issue 66, July 1995, Pages 91-101
A.F. BASTAWROWS; M.M. ABDEL-HAFFEEZ; H.A. ABDEL-KADER; R.S. SEDDEK
Volume 30.2, Issue 60, January 1994, Pages 232-241
R.S. SEDDEK; H.A . ABDEL-KADER; A.A. EL-SHANAWANY