@book { ElectronicCommerceimBankensektor,
    title = "Electronic Commerce im Bankensektor",
    author = "Ute {Spiller}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832424602",
    url = "https://m.diplom.de/document/218258"
}