@book { InternetFluchoderSegen,
    title = "Internet - Fluch oder Segen?",
    author = "Ulrike {Clever}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832401801",
    url = "https://m.diplom.de/document/216130"
}