TY  - JOUR
AU  - V. V. Arestov
AU  - V. N. Gabushin
TI  - Best approximation of unbounded operators by bounded operators
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1995
SP  - 42
EP  - 68
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1995_11_a3/
LA  - ru
ID  - IVM_1995_11_a3
ER  -