%0 Journal Article
%A Yu. N. Bibikov
%T A sharpening of a theorem of Moser
%J Doklady Akademii Nauk
%D 1973
%P 766-769
%V 213
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_213_4_a2/
%G ru
%F DAN_1973_213_4_a2