%0 Journal Article
%A D. V. Treschev
%T Preservation of invariant manifolds of Hamiltonian systems in the presence of a perturbation
%J Matematičeskie zametki
%D 1991
%P 123-131
%V 50
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1991_50_4_a17/
%G ru
%F MZM_1991_50_4_a17