TY  - JOUR
AU  - Gösta Wahde
TI  - A Closure Problem for Spaces of Infinitely Differentiable Functions.
JO  - Mathematica Scandinavica
PY  - 1967
SP  - 209
EP  - 224
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1967__20_165991/
ID  - MS2_1967__20_165991
ER  -