@book { CommoditiesimPortfoliomanagement,
    title = "Commodities im Portfoliomanagement",
    author = "Carolin {Berger}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832499495",
    url = "https://m.diplom.de/document/225065"
}