Volume 55, Issue 120, January 2009, Pages 1-23
M.R. BADR; S.M. ABD EL HAFEZ; EMAN M. ABD EL FATAH
Volume 54, Issue 119, October 2008, Pages 1-9
ROWIDA M. RIAD; R.H. OSMAN; AMAL A.M. GHONEIM