@book { DasGeheimnisderJuwelenvilla,
    title = "Das Geheimnis der Juwelenvilla",
    author = "Barbara {Michaels} and Sonja {Winner}",
    year = "2020",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/593939"
}