TY  - JOUR
AU  - A. T. Asanova
TI  - Periodic Solutions in the Plane of Systems of Second-Order Hyperbolic Equations
JO  - Matematičeskie zametki
PY  - 2017
SP  - 20
EP  - 30
VL  - 101
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2017_101_1_a1/
LA  - ru
ID  - MZM_2017_101_1_a1
ER  -