TY  - JOUR
AU  - Eliashberg, Yakov
TI  - New invariants of open symplectic and contact manifolds
JO  - Journal of the American Mathematical Society
PY  - 1991
SP  - 513
EP  - 520
VL  - 04
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1991-1102580-2/
DO  - 10.1090/S0894-0347-1991-1102580-2
ID  - 10_1090_S0894_0347_1991_1102580_2
ER  -