@book { Lettere18431900,
    title = "Lettere 1843-1900",
    subtitle = "A cura di Antonio Baldassarre e Matthias von Orelli",
    author = "Antonio {Baldassarre} and Matthias {von Orelli}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1135961"
}