@book { KreditderivateimPortfoliomanagement,
    title = "Kreditderivate im Portfoliomanagement",
    author = "Klaus {Labecki}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836622424",
    url = "https://m.diplom.de/document/226350"
}