TY  - JOUR
AU  - Eduard Zehnder
AU  - Dietmar Salamon
TI  - KAM theory in configuration space.
JO  - Commentarii mathematici Helvetici
PY  - 1989
SP  - 84
EP  - 132
VL  - 64
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1989__64_1_140144/
ID  - CMH_1989__64_1_140144
ER  -