@book { DasGlckflltwohineswill,
    title = "Das Glück fällt, wohin es will",
    author = "Mara {Winter}",
    year = "2019",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/499301"
}