@book { DiepolitkonomischenPerspektivendesInternet,
    title = "Die politökonomischen Perspektiven des Internet",
    author = "Alois B. {Mannhart}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/217490"
}