%0 Journal Article
%A M. E. Lerner
%T A maximum principle for hyperbolic equations and its application to equations of mixed type
%J Doklady Akademii Nauk
%D 1967
%P 1269-1272
%V 177
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a4/
%G ru
%F DAN_1967_177_6_a4