@book { Enseignementsdistance,
    title = "Enseignements à distance",
    author = "Olivier {Marty}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/b16390",
    url = "https://www.peterlang.com/document/1113659"
}