@book{ title = "In Liebe und Zorn", author = "Arnold, Klaus", year = "2003", publisher = "Thorbecke", address = "Ostfildern", title = "Briefe aus dem Mittelalter", language = "ger", howpublished = "print", isbn = "3799501134", keywords = "Quelle", note = "Literaturverz. S. 197 - 206", content = "Inhaltsverzeichnis", }