%0 Journal Article
%A M. E. Lerner
%T The extremal property of the solutions of a certain class of hyperbolic equations
%J Doklady Akademii Nauk
%D 1969
%P 1281-1283
%V 184
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_184_6_a5/
%G ru
%F DAN_1969_184_6_a5