@article{MAN_1871__4_156526,
     author = {Hierbolzer},
     title = {Ueber eine {Fl\"ache} der vierten {Ordnung}},
     journal = {Mathematische Annalen},
     pages = {172--180},
     publisher = {mathdoc},
     volume = {4},
     year = {1871},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1871__4_156526/}
}