@book { KatholizismusundFreiwirtschaft,
    title = "Katholizismus und Freiwirtschaft",
    subtitle = "Das Lebensreformprogramm des Johannes Ude",
    author = "Christoph {Karner}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093544"
}