@article{MAN_1934__109_159671,
     author = {D. Menchoff},
     title = {Sur les repr\'esentations qui conservent les angles},
     journal = {Mathematische Annalen},
     pages = {101--159},
     publisher = {mathdoc},
     volume = {109},
     year = {1934},
     zbl = {59.0347.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1934__109_159671/}
}