@book { WarlikowskiExtraEcclesiam,
    title = "Warlikowski: Extra Ecclesiam",
    author = "Grzegorz {Niziolek}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02403-6",
    url = "https://www.peterlang.com/document/1046324"
}