%0 Journal Article
%A V. M. Šalov
%T Minimum principle of a quadratic functional for a hyperbolic equation
%J Differencialʹnye uravneniâ
%D 1965
%P 1338-1365
%V 1
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1965_1_10_a5/
%G ru
%F DE_1965_1_10_a5