%0 Journal Article
%A M. P. Grigolia
%T A modified characteristic problem for hyperbolic systems with singularities
%J Differencialʹnye uravneniâ
%D 1982
%P 1005-1014
%V 18
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_6_a9/
%G ru
%F DE_1982_18_6_a9