@book { EuropischePerspektivenderDemokratie,
    title = "Europäische Perspektiven der Demokratie",
    author = "Guido {Thiemeyer} and Hartmut {Ullrich}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098994"
}