@book { SpracheVerstehenundVerstndlichkeit,
    title = "Sprache: Verstehen und Verständlichkeit",
    author = "Bernd {Spillner}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1116233"
}