%0 Journal Article %A Saker, S.H. %T Oscillation of third-order difference equations. %J Portugaliae mathematica %D 2004 %P 249-257 %V 61 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_2004__61_3_51565/ %G en %F PORMA_2004__61_3_51565