@book { ReligiseBildungalsWeg,
    title = "Religiöse Bildung als Weg",
    author = "Peter {Graf}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03683-1",
    url = "https://www.peterlang.com/document/1047890"
}