@book { SometimesSpeakingwithaSingleVoice,
    title = "Sometimes Speaking with a Single Voice",
    subtitle = "The European Community as an International Actor, 1969–1979",
    author = "Lorenzo {Ferrari}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6623-8",
    url = "https://www.peterlang.com/document/1054518"
}