%0 Journal Article
%A S. S. Kharibegashvili
%T A characterization problem for a class of second-order hyperbolic systems with a characteristic line of degeneration
%J Differencialʹnye uravneniâ
%D 1990
%P 305-313
%V 26
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_2_a15/
%G ru
%F DE_1990_26_2_a15