Volume 51, Issue 106, July 2005, Pages 1-10
AMAL M.A. RAOF; NAHED A. MAHMOUD; A.S. AHMED
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