@article{MZ_1953__59_169384,
     author = {Friedemann Stallmann},
     title = {Konforme {Abbildung} gewisser {Kreisbogenvierecke} als {Eigenwertproblem.}},
     journal = {Mathematische Zeitschrift},
     pages = {211--230},
     publisher = {mathdoc},
     volume = {59},
     year = {1953},
     zbl = {0051.31401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1953__59_169384/}
}