@book { DasgroeKochbuchfrdieLeber,
    title = "Das große Kochbuch für die Leber",
    author = " {Deutsche Leberstiftung}",
    year = "2022",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1273532"
}