@article{MZ_1949__51_169097,
     author = {OTTO, HAUPT},
     title = {\"Uber einige affingeometrische {Ovals\"atze} in der direkten {Infinitesimalgeometrie}},
     journal = {Mathematische Zeitschrift},
     pages = {635--657},
     publisher = {mathdoc},
     volume = {51},
     year = {1949},
     zbl = {0034.39402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1949__51_169097/}
}