@book { FutureSuccessFactorsofFinancePortals,
    title = "Future Success Factors of Finance Portals",
    subtitle = "Dividing the Second Wave of Customers",
    author = "Axel {Täubert}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832454920",
    url = "https://m.diplom.de/document/220802"
}