@article{AM2_1990__39_2-3_137335,
     author = {Maciej Sablik},
     title = {The continuous solution of a functional equation of {Abel.}},
     journal = {Aequationes mathematicae},
     pages = {19--39},
     year = {1990},
     volume = {39},
     number = {2-3},
     zbl = {0694.39004},
     url = {http://geodesic.mathdoc.fr/item/AM2_1990__39_2-3_137335/}
}