%0 Journal Article
%A A. M. Samoilenko
%A I. V. Polesya
%T Occurrence of invariant sets in the neighborhood of the equilibrium position
%J Differencialʹnye uravneniâ
%D 1975
%P 1409-1415
%V 11
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1975_11_8_a6/
%G ru
%F DE_1975_11_8_a6