@book { EinwilligungundRichtervorbehalt,
    title = "Einwilligung und Richtervorbehalt",
    author = "Alexander {Kolz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101453"
}