@article{MZ_1932__35_168376,
     author = {E., H\"older},
     title = {\"Uber eine potentialtheoretische {Eigenschaft} der {Ellipse}},
     journal = {Mathematische Zeitschrift},
     pages = {632--643},
     publisher = {mathdoc},
     volume = {35},
     year = {1932},
     zbl = {0005.10602},
     url = {http://geodesic.mathdoc.fr/item/MZ_1932__35_168376/}
}