@book { kumenedesNordens,
    title = "Ökumene des Nordens",
    author = "Heinrich {Assel} and Christfried {Böttrich} and Henning {Theißen}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00304-8",
    url = "https://www.peterlang.com/document/1054236"
}