@book { DieFunktionKeiesinderArtusgesellschaft,
    title = "Die Funktion Keies in der Artusgesellschaft",
    author = "David {Bies}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640296675",
    url = "https://www.hausarbeiten.de/document/124319"
}