@book { IASversusHGB,
    title = "IAS versus HGB",
    author = "Adrienne-Katharina {Schön}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832423872",
    url = "https://m.diplom.de/document/218201"
}