@book { SteuerlicheAspektederbetrieblichenAltersversorgung,
    title = "Steuerliche Aspekte der betrieblichen Altersversorgung",
    author = "Gabriele {Walhöfer}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832457372",
    url = "https://m.diplom.de/document/221200"
}