%0 Journal Article
%A G. S. Krechetov
%T Lyapunov functions for second-order autonomous systems of first and second classes
%J Differencialʹnye uravneniâ
%D 1982
%P 772-778
%V 18
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_5_a6/
%G ru
%F DE_1982_18_5_a6