@book { Unabhngig,
    title = "(Un)abhängig?!",
    author = "Daniela {Wörner} and Annette {Roensch}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02715-0",
    url = "https://www.peterlang.com/document/1047368"
}