TY  - JOUR
AU  - V. B. Korotkov
TI  - $T$-invariance of the coefficients of quasi-linear hyperbolic equations
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 271
EP  - 274
VL  - 172
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_172_2_a5/
LA  - ru
ID  - DAN_1967_172_2_a5
ER  -