@article{MAN_1889__33_157420,
     author = {Kober},
     title = {Zur {Gruppe} der acht harmonisch angeordneten {Fl\"achen} zweiten {Grades}},
     journal = {Mathematische Annalen},
     pages = {470--473},
     publisher = {mathdoc},
     volume = {33},
     year = {1889},
     zbl = {21.0656.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1889__33_157420/}
}