@book { DieversunkeneWelt,
    title = "Die versunkene Welt",
    subtitle = "Hannah Arendts Theorie des öffentlichen Handelns",
    author = "Seifried {Seyer}",
    year = "1998",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086380"
}