@book{Kepler.1967, author = {Kepler, Johannes}, year = {1967}, title = {Weltharmonik (Harmonice mundi, dt.): \"{U}bers. u. eingel. v. Max Caspar}, address = {M\"{u}nchen}, publisher = {Oldenbourg}, permalink = {\url{http://d-nb.info/457183071}} }