@article{10_4064_cm_18_1_169_179,
     author = {M. Kwapisz},
     title = {On a certain functional equation},
     journal = {Colloquium Mathematicum},
     pages = {169--179},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1967},
     doi = {10.4064/cm-18-1-169-179},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-18-1-169-179/}
}