@article{MAN_1917__78_158750,
     author = {Schauffler},
     title = {\"Uber wiederholte {Funktionen.}},
     journal = {Mathematische Annalen},
     pages = {52--62},
     publisher = {mathdoc},
     volume = {78},
     year = {1917},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1917__78_158750/}
}