TY  - JOUR
AU  - Yu. I. Volkov
TI  - On approximation in the mean by multidimensional positive linear operators
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1987
SP  - 85
EP  - 86
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1987_180_a44/
LA  - ru
ID  - TM_1987_180_a44
ER  -