@book { DigitalesFernseheninDeutschland,
    title = "Digitales Fernsehen in Deutschland",
    author = "Ansgar {Gerber}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832415235",
    url = "https://m.diplom.de/document/217368"
}