@article{BAG_1980__10_138183,
     author = {W. Schulz},
     title = {Ein gruppentheoretisches {Kriterium} f\"ur die {L\"osbarkeit} der {Funktionalgleichung} f(x + y) {=F(f(x),f(y))}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {141--144},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     zbl = {0487.39003},
     url = {http://geodesic.mathdoc.fr/item/BAG_1980__10_138183/}
}