@book { Hotel13Band2DasRtselderZeitmaschine,
    title = "Hotel 13 - Band 2: Das Rätsel der Zeitmaschine",
    author = " {Hotel 13}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955204051",
    url = "https://m.dotbooks.de/document/230672"
}