TY  - JOUR
AU  - Yu. L. Shmul'yan
TI  - On operator balls and linear-fractional transformations with operator coefficients
JO  - Sbornik. Mathematics
PY  - 1968
SP  - 309
EP  - 326
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1968_6_3_a1/
LA  - en
ID  - SM_1968_6_3_a1
ER  -