TY  - JOUR
AU  - Burgess, Walter D.
AU  - Raphael, Robert M.
TI  - On extending ${\rm C}^{k}$ functions from an open set to $\mathbb R$ with applications
JO  - Czechoslovak Mathematical Journal
PY  - 2023
SP  - 487
EP  - 498
VL  - 73
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2023.0445-21/
DO  - 10.21136/CMJ.2023.0445-21
LA  - en
ID  - 10_21136_CMJ_2023_0445_21
ER  -