@article{JRAM_1955__195_150296,
     author = {Alexander Aigner},
     title = {Einige {S\"atze} \"uber {Lagebeziehungen} in endlichen {Graphen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {18--21},
     publisher = {mathdoc},
     volume = {195},
     year = {1955},
     zbl = {0070.18501},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1955__195_150296/}
}