TY  - JOUR
AU  - A. T. Fomenko
TI  - A~bordism theory for integrable nondegenerate Hamiltonian systems with two degrees of freedom. A~new topological invariant of higher-dimensional integrable systems
JO  - Izvestiya. Mathematics 
PY  - 1992
SP  - 731
EP  - 759
VL  - 39
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1992_39_1_a2/
LA  - en
ID  - IM2_1992_39_1_a2
ER  -