%0 Journal Article %A M. Kuczma %T A characterization of the exponential and logarithmic functions by functional equations %J Fundamenta Mathematicae %D 1963 %P 283-288 %V 52 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-52-3-283-288/ %R 10.4064/fm-52-3-283-288 %G en %F 10_4064_fm_52_3_283_288