@book { Hedging,
    title = "Hedging",
    subtitle = "Strategien nach IAS 39 aus bilanzpolitischer Sicht",
    author = "Metin {Yürek}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836604710",
    url = "https://m.diplom.de/document/228965"
}