@book { BundesratEmilWelti,
    title = "Bundesrat Emil Welti",
    subtitle = "Sein Einfluss auf die Bundesverfassungsrevision von 1874",
    author = "Peter {Eggenberger}",
    year = "1972",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069364"
}