Ibrahim S.A., Abdel Maksoud A. and Nassar M.F.
Eastern Mediterranean Health Journal 8 ( 2 ): 272 - 280 , 2002
Shaaban S.Y., Nassar M.F., Ibrahim S.A. and Mahmoud S.E.
Eastern Mediterranean Health Journal 8 ( 2 ): 290 - 297 , 2002
Alkhalifa M.S., Ibrahim S.A. and Osman S.H.
Eastern Mediterranean Health Journal 14 ( 5 ): 1015 - 1021 , 2008