@Book{KeplerBruce1915,
author  = "Kepler, Johannes and Bruce, Edmund",
title   = "Briefwechsel Keplers mit Edmund Bruce",
year    = "1915",
address = "München",
series  = "Abhandlungen",
volume  = "28,2",
url     = "https://publikationen.badw.de/en/003396520",
}