TY - JOUR AU - Z. Krzeszowiak TI - On differentiable solutions of the functional equation φ(f(x)) = g(x, φ(x)) for vector-valued functions JO - Annales Polonici Mathematici PY - 1972 SP - 121 EP - 128 VL - 27 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-27-2-121-128/ DO - 10.4064/ap-27-2-121-128 LA - en ID - 10_4064_ap_27_2_121_128 ER -