@book { StrategicPortfolioAnalysisANewMarketOpportunityforeAppealsLLC,
    title = "Strategic Portfolio Analysis: A New Market Opportunity for eAppeals LLC",
    author = "Alexander {Tange}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/225328"
}