@book { DerKampfgegendenKlerus,
    title = "Der Kampf gegen den Klerus",
    author = "Volker {Speth}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17116",
    url = "https://www.peterlang.com/document/1111529"
}