@book { JosefBurkardLeu18081865,
    title = "Josef Burkard Leu (1808-1865)",
    author = "Guido {Wüest}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069602"
}