%0 Journal Article
%A S. E. Zhelezovsky
%A V. Ph. Kirichenko
%A V. A. Krys'ko
%T Symmetrization of a hyperbolic equation
%J Differencialʹnye uravneniâ
%D 1989
%P 652-659
%V 25
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_4_a12/
%G ru
%F DE_1989_25_4_a12