@book { Erbschaftsteuer,
    title = "Erbschaftsteuer",
    author = "Mirko {Richtsteig}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836623179",
    url = "https://m.diplom.de/document/226196"
}