TY  - JOUR
AU  - Thomas Bartsch
AU  - Mónica Clapp
TI  - Bifurcation Theory for Symmetric Potential Operators and the Equvariant Cup-length.
JO  - Mathematische Zeitschrift
PY  - 1990
SP  - 341
EP  - 356
VL  - 204
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1990__204_3_183775/
ID  - MZ_1990__204_3_183775
ER  -