TY  - JOUR
AU  - Herbert Amann
TI  - Saddle Points and Multiple Solutions of Differential Equations.
JO  - Mathematische Zeitschrift
PY  - 1979
SP  - 127
EP  - 166
VL  - 169
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1979__169_172887/
ID  - MZ_1979__169_172887
ER  -