TY  - JOUR
AU  - A. Z. Ishmukhametov
TI  - On the smoothness of solutions of the Cauchy problem for a second-order hyperbolic operator-differential equation
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 493
EP  - 499
VL  - 23
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_3_a16/
LA  - ru
ID  - DE_1987_23_3_a16
ER  -