%0 Journal Article
%A V. V. Beletskii
%A G. V. Kasatkin
%T Extremal properties of resonant motions
%J Doklady Akademii Nauk
%D 1980
%P 58-62
%V 251
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_251_1_a15/
%G ru
%F DAN_1980_251_1_a15