%0 Journal Article
%A N. D. Kopachevskii
%T Inversion of Lagrange's theorem on the stability of small
%J Doklady Akademii Nauk
%D 1990
%P 71-73
%V 314
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a16/
%G ru
%F DAN_1990_314_1_a16