TY  - JOUR
AU  - V. V. Arestov
TI  - Approximation of unbounded operators by bounded operators and related extremal problems
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1996
SP  - 1093
EP  - 1126
VL  - 51
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1996_51_6_a3/
LA  - en
ID  - RM_1996_51_6_a3
ER  -