TY  - JOUR
AU  - V. V. Kozlov
TI  - Perturbation theory of Hamiltonian systems with noncompact invariant surfaces
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1988
SP  - 55
EP  - 61
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1988_2_a12/
LA  - ru
ID  - VMUMM_1988_2_a12
ER  -