@book { Histoiredespostesfranaises,
    title = "Histoire des postes françaises",
    subtitle = "Jusqu’en 1939",
    author = "Eugène {Vaillé}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6591-0",
    url = "https://www.peterlang.com/document/1054462"
}