@article{10_4064_ap_8_2_209_214,
     author = {M. Kuczma},
     title = {On continuous solutions of a functional equation},
     journal = {Annales Polonici Mathematici},
     pages = {209--214},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1960},
     doi = {10.4064/ap-8-2-209-214},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-8-2-209-214/}
}