@book { MobilePortaleLsungsvorschlagimBankensektor,
    title = "Mobile Portale - Lösungsvorschlag im Bankensektor",
    author = "Bernd {Dietrich}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832449858",
    url = "https://m.diplom.de/document/220549"
}