Volume 52, Issue 109, April 2006, Pages 274-284
F.A.R. SAWIRESS; M.Z. ATTIA; SOHAIR Y. SALEH
Volume 24.1, Issue 47, October 1990, Pages 63-74
M.Z. ATTIA; H.A.H. SALEM; H.L ABASS; M.K. SOLIMAN