@article{10_21136_AM_1971_103380,
     author = {Alda, V\'aclav},
     title = {On a functional equation},
     journal = {Applications of Mathematics},
     pages = {448--451},
     publisher = {mathdoc},
     volume = {16},
     number = {6},
     year = {1971},
     doi = {10.21136/AM.1971.103380},
     mrnumber = {0290806},
     zbl = {0228.90047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1971.103380/}
}