@book { Lalibrecirculationdespersonnes,
    title = "La libre circulation des personnes",
    subtitle = "États des lieux et perspectives",
    author = "Dominik {Hanf} and Rodolphe {Muñoz}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    url = "https://www.peterlang.com/document/1102615"
}