Volume 20.2, Issue 40, September 1988, Pages 143-147
K. FOUAD; A.S. AHMED; H.M. GOHAR; M.T. EL-KEIEY; LM. IBRAHIM; A. BAKEIR
Volume 11.2, Issue 22, January 1984, Pages 181-187
K. FOUAD; N.A. MISK; M. KASSEM