%0 Journal Article %A Tisdell, Christopher C. %T On the solvability of nonlinear first-order boundary-value problems %J Electronic Journal of Differential Equations %D 2006 %V 2006 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a119/ %G en %F EJDE_2006__2006__a119