@book { DerGottderChristen,
    title = "Der Gott der Christen",
    subtitle = "Vorwort und Einführung von Gotthold Hasenhüttl",
    author = "Daniel {Flormann}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103865"
}