@article{CMH_1981__56_139881,
     author = {Bruno Zimmermann},
     title = {\"Uber {Hom\"oomorphismen} n-dimensionaler {Henkelk\"orper} und endliche {Erweiterungen} von {Schottky-Gruppen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {474--486},
     publisher = {mathdoc},
     volume = {56},
     year = {1981},
     zbl = {0475.57015},
     url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139881/}
}