@book { Luxembourg,
    title = "Luxembourg",
    author = "Christophe {Sohn}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6124-0",
    url = "https://www.peterlang.com/document/1044112"
}