@book { RheinbndischerKonstitutionalismus,
    title = "Rheinbündischer Konstitutionalismus",
    author = "Hartwig {Brandt} and Ewald {Grothe}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103366"
}