@book { EinForecastsystemfrMedienunternehmen,
    title = "Ein Forecastsystem für Medienunternehmen",
    author = "Marcus {Franke}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836612784",
    url = "https://m.diplom.de/document/225766"
}