@book { FRIESLANDUNDDERGESPIEGELTEMORD,
    title = "FRIESLAND UND DER GESPIEGELTE MORD",
    author = "Christian {Dörge}",
    year = "2023",
    publisher = "Signum-Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1378938"
}