@book { FactorsandActors,
    title = "Factors and Actors",
    author = "Patrick {Villepin}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/b14098",
    url = "https://www.peterlang.com/document/1113478"
}