%0 Journal Article %A Donald Solomon %T On differentiability of vector-valued functions of a real variable %J Studia Mathematica %D 1967 %P 1-4 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-29-1-1-4/ %R 10.4064/sm-29-1-1-4 %G en %F 10_4064_sm_29_1_1_4