@book { DasNheDistanzModellvonKochundOesterreicher,
    title = "Das Nähe-Distanz-Modell von Koch und Oesterreicher",
    author = "Thomas {Kauf} and Jinan  {Khalil}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638067287",
    url = "https://www.hausarbeiten.de/document/93024"
}