@book { SkizzeeinerkommunikativenSprachgeschichte,
    title = "Skizze einer kommunikativen Sprachgeschichte",
    author = "Karl-Ernst {Sommerfeldt}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02988-8",
    url = "https://www.peterlang.com/document/1053590"
}