%0 Journal Article
%A P. I. Topalov
%T The action variable and the Poincar\'e Hamiltonian in a~neighbourhood of the critical circle
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1995
%P 216-217
%V 50
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1995_50_1_a13/
%G en
%F RM_1995_50_1_a13