@book { InstitutionundHandlung,
    title = "Institution und Handlung",
    subtitle = "Hermann Hellers Staatslehre im Lichte analytischer Theorien sozialen Handelns",
    author = "Vera {Gassmann}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105069"
}