@book { ImpliziteVolatilitt,
    title = "Implizite Volatilität",
    subtitle = "Strukturen, Analyse und Bedeutung im Optionshandel der Banken",
    author = "Mike {Weidner}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832401535",
    url = "https://m.diplom.de/document/216105"
}