@book { Erbschaftsteuerreform2009,
    title = "Erbschaftsteuerreform 2009",
    author = "Carolin {Braun}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836637848",
    url = "https://m.diplom.de/document/227320"
}