@article{ELMA_1955__10_140631,
     author = {Josef Krames},
     title = {Elementargeometrischer {Nachweis} des },
     journal = {Elemente der Mathematik},
     pages = {106--108},
     publisher = {mathdoc},
     volume = {10},
     year = {1955},
     zbl = {0064.41902},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1955__10_140631/}
}