@article{10_4064_fm_52_3_283_288,
     author = {M. Kuczma},
     title = {A characterization of the exponential and logarithmic functions by functional equations},
     journal = {Fundamenta Mathematicae},
     pages = {283--288},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1963},
     doi = {10.4064/fm-52-3-283-288},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-52-3-283-288/}
}