@Book{Freyberg[1833],
author  = "Freyberg, Maximilian Prokop von",
title   = "Über Wallensteins Katastrophe",
year    = "[1833]",
address = "",
series  = "Jahresberichte",
volume  = "3 (1831/33), Seite 122",
url     = "https://publikationen.badw.de/de/043716341",
}