%0 Journal Article %A Aversa, Vincenzo %A Laczkovich, M. %A Preiss, David %T Extension of differentiable functions %J Commentationes Mathematicae Universitatis Carolinae %D 1985 %P 597-609 %V 26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1985__26_3_a12/ %G en %F CMUC_1985__26_3_a12