@article{MAN_1926__95_159130,
     author = {T. Bonnesen},
     title = {Beweis f\"ur die {Maximaleigenschafft} der {Kugel} nebst einem {Beitrag} zur {Theorie} der konvexen {K\"orper.} {I.} {Das} isoepifane {Problem}},
     journal = {Mathematische Annalen},
     pages = {267--276},
     publisher = {mathdoc},
     volume = {95},
     year = {1926},
     zbl = {51.0373.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1926__95_159130/}
}