TY  - JOUR
AU  - V. I. Burenkov
TI  - The approximation of functions in the space $C^{r}(\Omega )$ by functions of compact support, for an arbitrary open set~$\Omega $
JO  - Informatics and Automation
PY  - 1972
SP  - 62
EP  - 74
VL  - 117
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1972_117_a4/
LA  - ru
ID  - TRSPY_1972_117_a4
ER  -