@book { DasgroeKinderKochbuch,
    title = "Das große Kinder-Kochbuch",
    author = "R.D.V. {Heldt}",
    year = "2015",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1024057"
}