@book { Europe2020,
    title = "Europe 2020",
    author = "Eric {Marlier} and David {Natali} and Rudi {Van Dam}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6027-4",
    url = "https://www.peterlang.com/document/1044047"
}