@book { ElectronicBillPresentmentandPayment,
    title = "Electronic Bill Presentment and Payment",
    subtitle = "Probleme bei der Einführung von EBPP-Systemen",
    author = "Christian {Franck}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832467128",
    url = "https://m.diplom.de/document/222087"
}