@book { PrivateAltersvorsorgeBeurteilungausgewhlterAnlageformen,
    title = "Private Altersvorsorge: Beurteilung ausgewählter Anlageformen",
    author = "Michael {Roth}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296401"
}