@article{MZ_1919__3_167502,
     author = {K. L\"owner},
     title = {\"Uber {Extremums\"atze} bei der konformen {Abbildung} des {\"Au{\ss}eren} des {Einheitskreises}},
     journal = {Mathematische Zeitschrift},
     pages = {65--77},
     publisher = {mathdoc},
     volume = {3},
     year = {1919},
     zbl = {47.0325.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1919__3_167502/}
}