@book { MglichkeitenundGrenzendesCreditRating,
    title = "Möglichkeiten und Grenzen des Credit Rating",
    author = "Sabine {Goldbach}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832404154",
    url = "https://m.diplom.de/document/216389"
}