@article{MZ_1954__60_169433,
     author = {Ivan Vidav},
     title = {\"Uber eine {Eigenschaft} der {Kugel.}},
     journal = {Mathematische Zeitschrift},
     pages = {320--327},
     publisher = {mathdoc},
     volume = {60},
     year = {1954},
     zbl = {0056.32901},
     url = {http://geodesic.mathdoc.fr/item/MZ_1954__60_169433/}
}