@article{GDZPPN002256584,
title = {Das Apollonische Problem},
journal = {Mathematische Annalen},
volume = {49},
year = {1897},
pages = {497-542},
zbl = {28.0518.06},
url = {http://dml.mathdoc.fr/item/GDZPPN002256584}
}
Study, E. Das Apollonische Problem. Mathematische Annalen, Tome 49 (1897) pp. 497-542. http://gdmltest.u-ga.fr/item/GDZPPN002256584/