@book { Versdesapprentissagesencooprationrencontresetperspectives,
    title = "Vers des apprentissages en coopération : rencontres et perspectives",
    author = "Yviane {Rouiller} and Katia {Lehraus}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1104378"
}