TY  - JOUR
AU  - S. E. Pastukhova
TI  - On the loss of smoothness of the solution of a mixed problem with an oblique derivative for the wave operator
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 478
EP  - 488
VL  - 26
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_3_a15/
LA  - ru
ID  - DE_1990_26_3_a15
ER  -