%0 Journal Article %A Zhang, Fuxing %A Li, Ya %T Almost periodic solutions for higher-order Hopfield neural networks without bounded activation functions %J Electronic Journal of Differential Equations %D 2007 %V 2007 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a299/ %G en %F EJDE_2007__2007__a299