@article{AM2_1976__14_136609,
     author = {E. Seneta},
     title = {On a functional equation with asymptotically unique continuous solutions.},
     journal = {Aequationes mathematicae},
     pages = {457--460},
     year = {1976},
     volume = {14},
     zbl = {0326.39009},
     url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136609/}
}