@article{ELMA_1946__1_140443,
     author = {H. Hadwiger},
     title = {\"Uber die rationalen {Hauptwinkel} der {Goniometrie.}},
     journal = {Elemente der Mathematik},
     pages = {98--100},
     publisher = {mathdoc},
     volume = {1},
     year = {1946},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1946__1_140443/}
}