@book { PerformanceAnalysebeiAktienfonds,
    title = "Performance-Analyse bei Aktienfonds",
    author = "Christel {Bauer}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832440411",
    url = "https://m.diplom.de/document/219672"
}