@book { UrsacheundWirkungBand5Mangelbeheben,
    title = "Ursache und Wirkung - Band 5: Mangel beheben",
    author = "Michael {von Känel}",
    year = "2023",
    publisher = "denkmalnach",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1387152"
}