TY - JOUR AU - M. Kuczma TI - On a new characterization of the exponential functions JO - Annales Polonici Mathematici PY - 1968 SP - 39 EP - 46 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-21-1-39-46/ DO - 10.4064/ap-21-1-39-46 LA - en ID - 10_4064_ap_21_1_39_46 ER -