@book { PaulCollowaldpionnierduneEuropeunir,
    title = "Paul Collowald, pionnier d'une Europe à unir",
    author = "Sabine {Menu}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/b14641",
    url = "https://www.peterlang.com/document/1113490"
}