%0 Journal Article
%A V. V. Kozlov
%T Perturbation theory of Hamiltonian systems with noncompact invariant surfaces
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1988
%P 55-61
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1988_2_a12/
%G ru
%F VMUMM_1988_2_a12