%0 Journal Article
%A N. A. Ëltysheva
%T On qualitative properties of solutions of some hyperbolic systems on the plane
%J Sbornik. Mathematics
%D 1989
%P 181-203
%V 63
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1989_63_1_a12/
%G en
%F SM_1989_63_1_a12