@book { RezeptklassikerLowCarb,
    title = "Rezeptklassiker Low Carb",
    author = "Bettina {Snowdon}",
    year = "2019",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/507181"
}