@book { AmorefrFortgeschrittene,
    title = "Amore für Fortgeschrittene",
    author = "Cornelia {Härtl}",
    year = "2022",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/1216451"
}