@book { AmtsschutzdurchBestandsschutz,
    title = "Amtsschutz durch Bestandsschutz",
    author = "Nadine {Kramer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106887"
}