@article{MAN_1904__59_158155,
     author = {Friedrich Schur},
     title = {Zur {Bolyai-Lobatschefskijschen} {Geometrie}},
     journal = {Mathematische Annalen},
     pages = {314--320},
     publisher = {mathdoc},
     volume = {59},
     year = {1904},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1904__59_158155/}
}