@article{GDZPPN002054949,
title = {Dreikreisesatz und Zentrumproblem.},
journal = {Commentarii mathematici Helvetici},
volume = {21},
year = {1948},
pages = {185-188},
language = {de},
url = {http://dml.mathdoc.fr/item/GDZPPN002054949}
}
Cremer, Hubert. Dreikreisesatz und Zentrumproblem.. Commentarii mathematici Helvetici, Tome 21 (1948) pp. 185-188. http://gdmltest.u-ga.fr/item/GDZPPN002054949/