@book { DieDigitaleDividendebeiderdigitalenDistribution,
    title = "Die 'Digitale Dividende' bei der digitalen Distribution",
    author = "Torsten {Braun}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836626385",
    url = "https://m.diplom.de/document/226582"
}