%0 Journal Article %A Shen, Jianhua %A Stavroulakis, I.P. %T Oscillation criteria for delay difference equations %J Electronic Journal of Differential Equations %D 2001 %V 2001 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2001__2001__a117/ %G en %F EJDE_2001__2001__a117