@book { WillyBrandtetlunitdelEurope,
    title = "Willy Brandt et l’unité de l’Europe",
    author = "Andreas {Wilkens}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6151-6",
    url = "https://www.peterlang.com/document/1044105"
}