TY  - JOUR
AU  - Vieri Benci
AU  - Paul H. Rabinowitz
TI  - Critical Point Theorems for Indefinite Functionals.
JO  - Inventiones mathematicae
PY  - 1979
SP  - 241
EP  - 274
VL  - 52
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1979__52_142650/
ID  - IM_1979__52_142650
ER  -