@book { AStrategyfortheManagementofDigitalInformationProducts,
    title = "A Strategy for the Management of Digital Information Products",
    author = "Andreas {Hart}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832498481",
    url = "https://m.diplom.de/document/224965"
}