@book { Unternehmensteuerreform2008,
    title = "Unternehmensteuerreform 2008",
    author = "Andreas {Persch}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836606066",
    url = "https://m.diplom.de/document/225407"
}