@article{MZ_1943__49_169030,
     author = {H. Hadwiger},
     title = {\"Uber extremale {Punktverteilungen} in ebenen {Gebieten}},
     journal = {Mathematische Zeitschrift},
     pages = {370--373},
     publisher = {mathdoc},
     volume = {49},
     year = {1943},
     zbl = {0063.01848},
     url = {http://geodesic.mathdoc.fr/item/MZ_1943__49_169030/}
}