%0 Journal Article
%A S. S. Kharibegashvili
%T Characteristic problem for second-order strictly hyperbolic systems with two independent variables
%J Differencialʹnye uravneniâ
%D 1979
%P 142-152
%V 15
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_1_a17/
%G ru
%F DE_1979_15_1_a17