%0 Journal Article
%A S. I. Pokhozhaev
%T On periodic solutions of some nonlinear hyperbolic equations
%J Doklady Akademii Nauk
%D 1971
%P 1274-1277
%V 198
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_198_6_a6/
%G ru
%F DAN_1971_198_6_a6