TY  - JOUR
AU  - A. F. Filippov
TI  - A boundary value problem for the wave equation
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 2043
EP  - 2050
VL  - 13
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_11_a14/
LA  - ru
ID  - DE_1977_13_11_a14
ER  -