@book { DigitalesFernsehen,
    title = "Digitales Fernsehen",
    author = "Carsten {Petry}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832467661",
    url = "https://m.diplom.de/document/221726"
}