@book { PortfoliooptimierungmitHedgefonds,
    title = "Portfoliooptimierung mit Hedgefonds",
    author = "André {Merz}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832491383",
    url = "https://m.diplom.de/document/223905"
}