TY  - JOUR
AU  - V. M. Šalov
TI  - Minimum principle of a quadratic functional for a hyperbolic equation
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 1338
EP  - 1365
VL  - 1
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_10_a5/
LA  - ru
ID  - DE_1965_1_10_a5
ER  -