@book { FunktionaleVariationslinguistik,
    title = "Funktionale Variationslinguistik",
    subtitle = "Untersuchungen zur Dynamik von Sprachkontakten in der Galloromania und Italoromania",
    author = "Thomas {Stehl}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1109269"
}