TY  - JOUR
AU  - G. G. Magaril-Il'yaev
TI  - Exact solutions of some approximation problems by means of positive operators
JO  - Matematičeskie zametki
PY  - 1990
SP  - 91
EP  - 99
VL  - 48
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1990_48_3_a11/
LA  - ru
ID  - MZM_1990_48_3_a11
ER  -