@book { Vieillissementetclassessociales,
    title = "Vieillissement et classes sociales",
    author = "Cornelia {Hummel} and Nathalie {Burnay}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b11387",
    url = "https://www.peterlang.com/document/1055800"
}