%0 Journal Article
%A Ya. G. Sinai
%T Letters to the Editor of Uspekhi Matematicheskikh Nauk
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1965
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1965_20_4_a36/
%G ru
%F RM_1965_20_4_a36