@book { DasGeheimnisdesverwegenenHerzogs,
    title = "Das Geheimnis des verwegenen Herzogs",
    author = "Ellie {St. Clair} and F. {Conrad}",
    year = "2024",
    publisher = "Prairie Lily Press",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1471244"
}