@article{MZ_1939__44_168833,
     author = {E., Schmidt},
     title = {\"Uber das isoperimetrische {Problem} im {Raum} von n {Dimensionen}},
     journal = {Mathematische Zeitschrift},
     pages = {689--788},
     publisher = {mathdoc},
     volume = {44},
     year = {1939},
     zbl = {65.0833.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__44_168833/}
}