%0 Journal Article
%A Herbert Amann
%T Saddle Points and Multiple Solutions of Differential Equations.
%J Mathematische Zeitschrift
%D 1979
%P 127-166
%V 169
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1979__169_172887/
%F MZ_1979__169_172887