TY  - JOUR
AU  - O. Vejvoda
AU  - M. Shtedry
TI  - Existence of classical periodic solutions of the wave equation. The relation of the number-theoretic character of the period and the geometric properties of solutions
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 1733
EP  - 1739
VL  - 20
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_10_a10/
LA  - ru
ID  - DE_1984_20_10_a10
ER  -