@article{MAN_1919__80_158811,
     author = {L.E.J. Brouwer},
     title = {\"Uber die periodischen {Transformationen} der {Kugel.} {Von} {L.E.J.} {Brouwer} in {Amsterdam}},
     journal = {Mathematische Annalen},
     pages = {39--41},
     publisher = {mathdoc},
     volume = {80},
     year = {1919},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1919__80_158811/}
}