@book { HowUsefulistheInformationRatiotoEvaluatethePerformanceofPortfolioManagers,
    title = "How Useful is the Information Ratio to Evaluate the Performance of Portfolio Managers?",
    author = "Christoph {Schneider}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836632065",
    url = "https://m.diplom.de/document/226996"
}