@book { VorbereitungaufdasRating,
    title = "Vorbereitung auf das Rating",
    subtitle = "Ein Leitfaden für KMU",
    author = "Annamaria {Buday}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832472900",
    url = "https://m.diplom.de/document/222588"
}