@book { DieBurgherrin,
    title = "Die Burgherrin",
    subtitle = "Der Clan des Greifen - die komplette erste Staffel in einem eBook",
    author = "Roland {Mueller}",
    year = "2017",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/351814"
}