@book { OnlineBrokeragealseffizientesBrsenhandelssystem,
    title = "Online Brokerage als effizientes Börsenhandelssystem",
    author = "Marwan {Shaif}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832484170",
    url = "https://m.diplom.de/document/223605"
}