@book { Documentsdiplomatiquesfranais,
    title = "Documents diplomatiques français",
    subtitle = "1973 – Tome I (1er janvier – 30 juin)",
    author = " {Ministère des Affaires étrangères}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    url = "https://www.peterlang.com/document/1114363"
}