%0 Journal Article
%A V. G. Zadorozhniy
%T Second-order differential equations in variational derivatives
%J Differencialʹnye uravneniâ
%D 1989
%P 1679-1683
%V 25
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_10_a3/
%G ru
%F DE_1989_25_10_a3