%0 Journal Article
%A B. P. Demidovich
%A Yu. V. Malyshev
%T Further development of the theorem of N.\,G.~{\v C}etaev on the instability of motion
%J Differencialʹnye uravneniâ
%D 1977
%P 841-847
%V 13
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1977_13_5_a4/
%G ru
%F DE_1977_13_5_a4