@book { CsarvonArxPhilippEtterBriefwechselundDokumente19401941,
    title = "Cäsar von Arx - Philipp Etter- Briefwechsel und Dokumente 1940-1941",
    subtitle = "Mit einem Nachwort von Urs Viktor Kamber",
    author = "Armin {Arnold} and Rolf {Röthlisberger}",
    year = "1985",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1073984"
}