@book { BusinessplanfreinInternetRadio,
    title = "Businessplan für ein Internet-Radio",
    author = "Ayhan {Akilli}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832464639",
    url = "https://m.diplom.de/document/221884"
}