@book { LangfristigeBetrachtungderSparquotederprivatenHaushalteDeutschlands,
    title = "Langfristige Betrachtung der Sparquote der privaten Haushalte Deutschlands",
    author = "Alexander {Simon}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836640466",
    url = "https://m.diplom.de/document/227486"
}