%0 Journal Article %A Nguyen Thanh Lan %T Almost periodic solutions of higher order differential equations on Hilbert spaces %J Electronic Journal of Differential Equations %D 2010 %V 2010 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a255/ %G en %F EJDE_2010__2010__a255