%0 Journal Article %A Gösta Wahde %T A Closure Problem for Spaces of Infinitely Differentiable Functions. %J Mathematica Scandinavica %D 1967 %P 209-224 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1967__20_165991/ %F MS2_1967__20_165991