@article{MAN_1947__120_160152,
     author = {Otto Haupt},
     title = {Schwache {Ordnung} im projektiven n-dimensionalen {Raum} {Rn} .},
     journal = {Mathematische Annalen},
     pages = {473--491},
     publisher = {mathdoc},
     volume = {120},
     year = {1947},
     zbl = {0032.31201},
     url = {http://geodesic.mathdoc.fr/item/MAN_1947__120_160152/}
}