TY - JOUR AU - Donald Solomon TI - On differentiability of vector-valued functions of a real variable JO - Studia Mathematica PY - 1967 SP - 1 EP - 4 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-29-1-1-4/ DO - 10.4064/sm-29-1-1-4 LA - en ID - 10_4064_sm_29_1_1_4 ER -