@article{MZ_1959__71_169794,
     author = {Dieter Gaier},
     title = {\"Uber ein {Extremalproblem} der konformen {Abbildung.}},
     journal = {Mathematische Zeitschrift},
     pages = {83--88},
     publisher = {mathdoc},
     volume = {71},
     year = {1959},
     zbl = {0106.28402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169794/}
}