@Book{KeplerCasparDyck1959,
author  = "Kepler, Johannes and Caspar, Max [Hg./Red.] and Dyck, Walther von [Hg./Red.]",
title   = "Gesammelte Werke. Briefe 1620-1630",
year    = "1959",
address = "München",
series  = "Kepler. Gesammelte Werke",
volume  = "18",
url     = "https://publikationen.badw.de/de/002334752",
}