@book { UnternehmensbewertungmittelsDiscountedCashFlowAnalysen,
    title = "Unternehmensbewertung mittels Discounted Cash-Flow Analysen",
    author = "Jens {Wingenfeld}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/225365"
}