TY  - JOUR
AU  - P. E. Sobolevskii
TI  - Comparison theorem for fractional powers of operators
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 294
EP  - 297
VL  - 174
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_174_2_a9/
LA  - ru
ID  - DAN_1967_174_2_a9
ER  -