@book { DerivativesasefficientRiskManagementinstrumentsApplicationtoCommodityMarkets,
    title = "Derivatives as efficient Risk Management instruments - Application to Commodity Markets",
    author = "Viktor  {Tielmann}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656078180",
    url = "https://www.hausarbeiten.de/document/183519"
}