%0 Journal Article %A Poppenberg, Markus %T Nash-Moser techniques for nonlinear boundary-value problems %J Electronic Journal of Differential Equations %D 2003 %V 2003 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a15/ %G en %F EJDE_2003__2003__a15