@book { KreditrisikomessungBankenportfoliosundinterneModelle,
    title = "Kreditrisikomessung, Bankenportfolios und interne Modelle",
    author = "Thomas {Weller}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832482343",
    url = "https://m.diplom.de/document/223230"
}