@article{MAN_1925__94_159099,
     author = {E. Krahn},
     title = {\"Uber eine von {RayIeigh} formulierte {Minimaleigenschafft} des {Kreises}},
     journal = {Mathematische Annalen},
     pages = {97--100},
     publisher = {mathdoc},
     volume = {94},
     year = {1925},
     zbl = {51.0356.05},
     url = {http://geodesic.mathdoc.fr/item/MAN_1925__94_159099/}
}