%0 Journal Article
%A V. F. Lazutkin
%T Existence of a~continuum of closed invariant curves for a~convex billiard
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1972
%V 27
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1972_27_3_a13/
%G ru
%F RM_1972_27_3_a13