@book { DerArmutsbegriffderWaldenser,
    title = "Der Armutsbegriff der Waldenser",
    subtitle = "Eine sozialphilosophische Annäherung",
    author = "Paul R. {Tarmann}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135429"
}