@book { GrundrechtsschrankeninderEuropischenGemeinschaft,
    title = "Grundrechtsschranken in der Europäischen Gemeinschaft",
    author = "Urs {Schildknecht}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1090416"
}