@book { InteraktivesFernsehen,
    title = "Interaktives Fernsehen",
    author = "Joscha {Beutel}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836622684",
    url = "https://m.diplom.de/document/226362"
}