@book { Jahresabschlu,
    title = "Jahresabschluß",
    author = "Monika {Krüger-Ohl}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832406806",
    url = "https://m.diplom.de/document/216608"
}