@article{MZ_1959__71_169819,
     author = {Helmut Salzmann},
     title = {Topologische {Struktur} zweidimensionaler projektiver {Ebenen.}},
     journal = {Mathematische Zeitschrift},
     pages = {408--413},
     publisher = {mathdoc},
     volume = {71},
     year = {1959},
     zbl = {0092.38402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169819/}
}