@book { NationalRegionalandMinorityLanguagesinEurope,
    title = "National, Regional and Minority Languages in Europe",
    author = "Gerhard {Stickel (EFNIL)}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00951-4",
    url = "https://www.peterlang.com/document/1044340"
}