%0 Journal Article
%A D. P. Kostomarov
%T An Application of the Averaging Method and Hadamard's Method of Descent to the Analysis of the Cauchy Problem for an Ultra-Hyperbolic Equation
%J Differencialʹnye uravneniâ
%D 2002
%P 1397-1403
%V 38
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2002_38_10_a13/
%G ru
%F DE_2002_38_10_a13