TY  - JOUR
AU  - P. E. Sobolevskii
TI  - On logarithms of normal positive operators
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1961
VL  - 16
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1961_16_3_a18/
LA  - ru
ID  - RM_1961_16_3_a18
ER  -