Volume 17.1, Issue 33, May 1986, Pages 52-58
A.A. BARAKAT; LM. REDA; A. MICHAEL; M.L NASSAR; ROUKAHIA M. OSMAN
Volume 12.2, Issue 24, September 1984, Pages 105-113
A.A. BARAKAT; M.T. SHOUMAN; ROUKAHIA M. OSMAN