TY  - JOUR
AU  - S. I. Pokhozhaev
TI  - On periodic solutions of some nonlinear hyperbolic equations
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 1274
EP  - 1277
VL  - 198
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_198_6_a6/
LA  - ru
ID  - DAN_1971_198_6_a6
ER  -