@book { VomKonzessionszwangzumNormativrecht,
    title = "Vom Konzessionszwang zum Normativrecht",
    author = "Christin {Dörr}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03187-4",
    url = "https://www.peterlang.com/document/1047813"
}