@book { ForaSovereignEurope,
    title = "For a Sovereign Europe",
    author = "Sophie {Heine}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    doi = "10.3726/b15894",
    url = "https://www.peterlang.com/document/1058329"
}