@article{CMH_1940__13_138768,
     author = {H. Hadwiger},
     title = {\"Uberdeckung ebener {Bereiche} durch {Kreise} und {Quadrate.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {195--200},
     publisher = {mathdoc},
     volume = {13},
     year = {1940},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1940__13_138768/}
}