@book { JosefBerchtold18331894,
    title = "Josef Berchtold (1833-1894)",
    subtitle = "Ein Leben gegen den Ultramontanismus",
    author = "Moritz {Waibel}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103651"
}