@article{MZ_1956__64_169555,
     author = {Gerhard Ringel},
     title = {Teilungen der {Ebene} durch {Geraden} oder topologische {Geraden.}},
     journal = {Mathematische Zeitschrift},
     pages = {79--102},
     publisher = {mathdoc},
     volume = {64},
     year = {1956},
     zbl = {0070.16108},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__64_169555/}
}