@book { Auxoriginesdeladiplomatieeuropenne,
    title = "Aux origines de la diplomatie européenne",
    author = "Maria {Gainar}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6226-1",
    url = "https://www.peterlang.com/document/1044146"
}