@book { EinsatzvonDerivatenimPortfoliomanagement,
    title = "Einsatz von Derivaten im Portfoliomanagement",
    author = "Christoph {Schmitt}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832460419",
    url = "https://m.diplom.de/document/221510"
}