Volume 14.2, Issue 28, May 1985, Pages 27-34
A, HIFNY; A.H.S. HASSAN; AZIZA, A.A. SELIM; M.N. MOUSTAFA
Volume 11.1, Issue 21, June 1983, Pages 19-24
M.R. FATH-ELBAB; A, HIFNY; A.K. AHMED; M. EL-M. ABDEL-MONEIM