TY  - JOUR
AU  - V. L. Velikin
TI  - Approximation in a~Banach space by a~convergent sequence of subspaces of fixed dimension
JO  - Informatics and Automation
PY  - 1987
SP  - 81
EP  - 82
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a42/
LA  - ru
ID  - TRSPY_1987_180_a42
ER  -