@book { HochdeutschinSkandinavien,
    title = "Hochdeutsch in Skandinavien",
    author = "John Ole {Askedal} and Hans-Peter {Naumann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094221"
}