@book { GeisterzahlenkeineZinsen,
    title = "Geister zahlen keine Zinsen",
    author = "W. A. {Castell}",
    year = "2019",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/463899"
}