@book { KmpfendeKirchen,
    title = "Kämpfende Kirchen",
    subtitle = "Jugoslawiens religiöse Hypothek",
    author = "Klaus {Buchenau}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100831"
}