@article{ELMA_1969__24_140939,
     author = {Heiko Harborth},
     title = {Diagonalen im regul\"aren {n-Eck.}},
     journal = {Elemente der Mathematik},
     pages = {104--109},
     publisher = {mathdoc},
     volume = {24},
     year = {1969},
     zbl = {0177.48702},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140939/}
}