@book { DialectandMigrationinaChangingEurope,
    title = "Dialect and Migration in a Changing Europe",
    author = "Klaus J. {Mattheier}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1090491"
}