@book { Blutfrost,
    title = "Blutfrost",
    subtitle = "Thriller",
    author = "Sarah {Rayne} and Ursula {Bischoff}",
    year = "2018",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/452453"
}