%0 Journal Article %A Nguyen, Thanh Lan %T Periodicity of mild solutions to higher order differential equations in Banach spaces %J Electronic Journal of Differential Equations %D 2004 %V 2004 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a84/ %G en %F EJDE_2004__2004__a84