TY  - JOUR
AU  - P. E. Sobolevskii
TI  - On equations with operators forming an acute angle
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 754
EP  - 757
VL  - 116
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_116_5_a9/
LA  - ru
ID  - DAN_1957_116_5_a9
ER  -