@book { BundesordnunginderdeutschenGeschichte,
    title = "Bundesordnung in der deutschen Geschichte",
    author = "Christian {Gellinek}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15733",
    url = "https://www.peterlang.com/document/1111081"
}