%0 Journal Article
%A A. D. Bruno
%T Normalization of a Hamiltonian system near an invariant cycle or torus
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1989
%P 53-89
%V 44
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1989_44_2_a1/
%G en
%F RM_1989_44_2_a1