@book { DerBegriffderSchuldimWerkvonHeinrichBll,
    title = "Der Begriff der Schuld im Werk von Heinrich Böll",
    author = "Wolfgang {Stolz}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105362"
}