@article{MOMA_1948__52_176798,
     author = {Hans Hornich},
     title = {Die algebraischen {Funktionen,} deren {Iteration} die {Identit\"at} liefert.},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {311--322},
     publisher = {mathdoc},
     volume = {52},
     year = {1948},
     zbl = {0031.30301},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1948__52_176798/}
}