@book { IPTV,
    title = "IPTV",
    subtitle = "Paradigmenwechsel für die werbetreibende Industrie",
    author = "Rena {Seiler}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836604772",
    url = "https://m.diplom.de/document/228971"
}