@book { HochdeutschinSkandinavienIII,
    title = "Hochdeutsch in Skandinavien III",
    author = "Christer {Lindqvist}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101616"
}