@book { Abgeltungsteuer,
    title = "Abgeltungsteuer",
    author = "Jan {Kippri}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836608619",
    url = "https://m.diplom.de/document/229082"
}