@misc{MZ_1925__23_167860,
     title = {Kowalewski, {G.,} {Die} {Identit\"atsbedingungen} der nat\"urlichen {Geometrie}},
     journal = {Mathematische Zeitschrift},
     pages = {246--253},
     publisher = {mathdoc},
     volume = {23},
     year = {1925},
     zbl = {51.0328.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1925__23_167860/}
}