@book { KaiFlammersfeldunddasErwachenderGeysira,
    title = "Kai Flammersfeld und das Erwachen der Geysira",
    author = "Hagen {Röhrig}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/996381"
}