@book { DasSchwertdesErichvonBelden,
    title = "Das Schwert des Erich von Belden",
    author = "Alfred {Bekker}",
    year = "2021",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/1161988"
}