Volume 35.2, Issue 70, July 1996, Pages 258-262
S.T. RASHWAN; S.B. ELGLLAD; M.M. IBRAHIEM; H. ALKHALAF; A. AZAB
Volume 25.1, Issue 49, April 1991, Pages 211-215
A. AZAB; S.M. HASSAN; T.S. QUBIH