@book { Rgionalismefdralismecologisme,
    title = "Régionalisme, fédéralisme, écologisme",
    author = "Mark {Dubrulle}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    url = "https://www.peterlang.com/document/1087761"
}