@book { BarrierefreiheitvonWebinhalten,
    title = "Barrierefreiheit von Webinhalten",
    author = "Jens {Gundermann}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836649476",
    url = "https://m.diplom.de/document/227901"
}