TY  - JOUR
AU  - V. I. Burenkov
TI  - On the approximation of functions in $C^r(\Omega)$ where $\Omega$ is an arbitrary open set
JO  - Doklady Akademii Nauk
PY  - 1972
SP  - 16
EP  - 18
VL  - 202
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1972_202_1_a2/
LA  - ru
ID  - DAN_1972_202_1_a2
ER  -