@article{MOMA_1971__75_177540,
     author = {Fritz Hohenberg},
     title = {\"Uber den {Zentralri{\ss}} des {Torus.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {123--135},
     publisher = {mathdoc},
     volume = {75},
     year = {1971},
     zbl = {0215.50204},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1971__75_177540/}
}