TY  - JOUR
AU  - Kh. G. Umarov
TI  - Riemann's method for some hyperbolic equations with constant operator coefficients
JO  - Doklady Akademii Nauk
PY  - 1981
SP  - 549
EP  - 553
VL  - 259
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1981_259_3_a9/
LA  - ru
ID  - DAN_1981_259_3_a9
ER  -