Volume 27.1, Issue 53, April 1992, Pages 269-278
A.H. SAID; LOTFIA, S. FAHMY; A.A. HEGAZY; M.B. MOSTAFA
Volume 10.1, Issue 19, June 1982, Pages 169-176
A.H. SAID; L.S. FAHMY; A. HASSANEIN; E. EL-GUINDI