@article{MAN_1933__108_159631,
     author = {H. GRUNSKY},
     title = {Einige {Analoga} zum {Schwarzschen} {Lemma}},
     journal = {Mathematische Annalen},
     pages = {190--196},
     publisher = {mathdoc},
     volume = {108},
     year = {1933},
     zbl = {0006.26203},
     url = {http://geodesic.mathdoc.fr/item/MAN_1933__108_159631/}
}