%0 Journal Article
%A Burgess, Walter D.
%A Raphael, Robert M.
%T On extending ${\rm C}^{k}$ functions from an open set to $\mathbb R$ with applications
%J Czechoslovak Mathematical Journal
%D 2023
%P 487-498
%V 73
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2023.0445-21/
%R 10.21136/CMJ.2023.0445-21
%G en
%F 10_21136_CMJ_2023_0445_21