@book { KinderinBalance,
    title = "Kinder in Balance",
    author = "Dietlind {Zimmermann} and Norbert {Heinrich} and Hans Dieter {Wöhrle}",
    year = "2023",
    publisher = "Testudo",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1369651"
}