TY  - JOUR
AU  - S. I. Pokhozhaev
TI  - The Existence and Nonexistence of Periodic Solutions to Certain Nonlinear Hyperbolic Equations
JO  - Informatics and Automation
PY  - 1999
SP  - 260
EP  - 285
VL  - 227
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1999_227_a18/
LA  - ru
ID  - TRSPY_1999_227_a18
ER  -