%0 Journal Article %A Wolfgang Walter %T Existence Theorems for a Two-Point Boundary Value Problem in Banach Space. %J Mathematische Annalen %D 1979 %P 55-64 %V 244 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1979__244_163290/ %F MAN_1979__244_163290