TY  - JOUR
AU  - S. V. Zhestkov
TI  - Coefficient conditions for the existence of $\omega$-periodic solutions of quasilinear wave systems
JO  - Differencialʹnye uravneniâ
PY  - 1992
SP  - 843
EP  - 847
VL  - 28
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1992_28_5_a13/
LA  - ru
ID  - DE_1992_28_5_a13
ER  -