@book { Volatilittsderivate,
    title = "Volatilitätsderivate",
    subtitle = "Bewertung, Hedging und Anwendung",
    author = "Tobias {Torbrügge}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842820227",
    url = "https://m.diplom.de/document/228612"
}