Volume 61, Issue 145, April 2015, Pages 257-269
HOWIDA M.A. ABD-EL-RAHMAN; MAHA IBRAHIM; DOHREIG, R.M.A.; HANAA A.E. ASFOUR
Volume 57, Issue 128, January 2011, Pages 1-21
MUNA E. KHOGALI; Y.M.I. DAGASH; M.G. EL-HAG