@book { SindInvestmentfondsdasbessereInstrumentfrdieAltersvorsorge,
    title = "Sind Investmentfonds das bessere Instrument für die Altersvorsorge?",
    author = "Angela {Steiner}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836638708",
    url = "https://m.diplom.de/document/227389"
}