@book { VikingKingdomDerSohndesFjords,
    title = "Viking Kingdom - Der Sohn des Fjords",
    author = "Heidrun {Hurst}",
    year = "2023",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/1154716"
}