%0 Journal Article %A H. Amann %A A. Ambrosett %A G. Mancini %T Elliptic Equations with Noninvertible Fredholm Linear Part and Bounded Nonlinearities. %J Mathematische Zeitschrift %D 1978 %P 179-194 %V 158 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1978__158_172630/ %F MZ_1978__158_172630