TY  - JOUR
AU  - P. I. Plotnikov
TI  - Existence of a~countable set of periodic solutions of the problem of forced oscillations for a~weakly nonlinear wave equation
JO  - Sbornik. Mathematics
PY  - 1989
SP  - 543
EP  - 556
VL  - 64
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1989_64_2_a16/
LA  - en
ID  - SM_1989_64_2_a16
ER  -