@book { Sprachenpolitikinsterreich,
    title = "Sprachenpolitik in Österreich",
    author = "Rudolf {de Cillia} and Eva {Vetter}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03165-2",
    url = "https://www.peterlang.com/document/1047137"
}