@book { FinanzanalysevonPensionsverpflichtungen,
    title = "Finanzanalyse von Pensionsverpflichtungen",
    author = "Daniel {van Treeck}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832474645",
    url = "https://m.diplom.de/document/222354"
}