@article{AM2_1977__16_136715,
     author = {Marek Kuczma},
     title = {On some alternative functional equations. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {322--322},
     year = {1977},
     volume = {16},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136715/}
}