@book { FinanzinnovationenundFinanzderivate,
    title = "Finanzinnovationen und Finanzderivate",
    author = "Steffen {Bremer}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832412029",
    url = "https://m.diplom.de/document/217122"
}