%0 Journal Article
%A Herbert Amann
%T Nonlinear Eigenvalue Problems Having Precisely Two Solutions.
%J Mathematische Zeitschrift
%D 1976
%P 27-38
%V 150
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1976__150_172402/
%F MZ_1976__150_172402