@book { IlvoltodelCristodualista,
    title = "Il volto del Cristo dualista",
    subtitle = "Da Marcione ai catari",
    author = "Enrico {Riparelli}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1102600"
}