@book { TatortMittelalterDoppelband1und2,
    title = "Tatort Mittelalter Doppelband 1 und 2",
    author = "Alfred {Bekker}",
    year = "2019",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/304609"
}