%0 Journal Article
%A N. N. Ladis
%T Energy functions for certain dynamical systems
%J Differencialʹnye uravneniâ
%D 1972
%P 790-794
%V 8
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_5_a6/
%G ru
%F DE_1972_8_5_a6