%0 Journal Article
%A V. A. Borovikov
%T An upper bound for the existence time of the smooth solution of a quasi-linear hyperbolic system
%J Doklady Akademii Nauk
%D 1971
%P 12-15
%V 201
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_201_1_a1/
%G ru
%F DAN_1971_201_1_a1