Volume 59, Issue 136, January 2013, Pages 35-46
M.R. ABD ELLAH; MAHA I. HAMED; D.R. IBRAHIM; H.Z. RATEB
Volume 56, Issue 127, October 2010, Pages 1-13
MAHA I. HAMED; A.A. ZAITOUN; T.A.A. EL-ALLAWY; M.I. MOURAD