Volume 36.2, Issue 72, January 1997, Pages 326-335
G.S. RADWAN; E.R.H. ATTIA; M.S. TAWFIK
Volume 36.1, Issue 71, October 1996, Pages 167-172
E.R.H. ATTIA; I. G.A. IBRAHIM; M.S. TAWFIK
Volume 12.1, Issue 23, May 1984, Pages 90-96
M.S. TAWFIK; S.M. NASHED; F.F.M. GODA; SAMIRA EL-GIBALY; A.F. FARID; S. NADA