@book { IndenFngendesWikingers,
    title = "In den Fängen des Wikingers",
    author = "Connie {Mason} and Bärbel {Hurst}",
    year = "2017",
    publisher = "venusbooks",
    address = "München, Deutschland",
    url = "https://m.venusbooks.de/document/370634"
}