%0 Journal Article
%A A. Z. Ishmukhametov
%T On the smoothness of solutions of the Cauchy problem for a second-order hyperbolic operator-differential equation
%J Differencialʹnye uravneniâ
%D 1987
%P 493-499
%V 23
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_3_a16/
%G ru
%F DE_1987_23_3_a16