%0 Journal Article %A Studený, Milan %T On the differentiation theorem in metric groups %J Commentationes Mathematicae Universitatis Carolinae %D 1983 %P 223-232 %V 24 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1983__24_2_a2/ %G en %F CMUC_1983__24_2_a2