@article{MAN_1889__34_157439,
     author = {Sch\"onflies},
     title = {Ueber {Gruppen} von {Transformationen} des {Raumes} in sich},
     journal = {Mathematische Annalen},
     pages = {172--203},
     publisher = {mathdoc},
     volume = {34},
     year = {1889},
     zbl = {21.0529.04},
     url = {http://geodesic.mathdoc.fr/item/MAN_1889__34_157439/}
}