TY  - JOUR
AU  - Alan Weinstein
TI  - Cohomology of Symplectomorphism Groups and Critical Values of Hamiltonians.
JO  - Mathematische Zeitschrift
PY  - 1989
SP  - 75
EP  - 82
VL  - 201
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174036/
ID  - MZ_1989__201_4_174036
ER  -