@book { OutsourcingimWertpapiergeschftderBanken,
    title = "Outsourcing im Wertpapiergeschäft der Banken",
    author = "Gerd {Göbel}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832416591",
    url = "https://m.diplom.de/document/217536"
}