@book { InternetBillPresentmentandPaymentalsneueFormdesElectronicBilling,
    title = "Internet Bill Presentment and Payment als neue Form des Electronic Billing",
    author = "Holger {Schwichtenberg}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832420192",
    url = "https://m.diplom.de/document/217453"
}