@book { Europol,
    title = "Europol",
    subtitle = "Polizei ohne rechtsstaatliche Bindungen?",
    author = "Vera {Korrell}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099436"
}