@article{CMH_1948__21_138942,
     author = {Hubert Cremer},
     title = {Dreikreisesatz und {Zentrumproblem.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {185--188},
     publisher = {mathdoc},
     volume = {21},
     year = {1948},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1948__21_138942/}
}