@book { DasSystemderinformationellenBefugnissederPolizei,
    title = "Das System der informationellen Befugnisse der Polizei",
    author = "Birgit {Tischer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098170"
}