@article{ELMA_1961__16_140731,
     author = {H. Hadwiger},
     title = {Die {Kugel} als {K\"orper} extremaler {Korona}},
     journal = {Elemente der Mathematik},
     pages = {102--103},
     publisher = {mathdoc},
     volume = {16},
     year = {1961},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1961__16_140731/}
}