@book { KonzeptionundImplementierungeinesCardSortingTools,
    title = "Konzeption und Implementierung eines Card Sorting Tools",
    author = "Steffen {Schilb}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/223694"
}