@Book{Druffel1893,
author  = "Druffel, August von",
title   = "Die Sendung des Cardinals Sfondrato an den Hof Karls V. 1547 - 1548",
year    = "1893",
address = "München",
series  = "Abhandlungen",
volume  = "20,5",
url     = "https://publikationen.badw.de/de/003833958",
}