@book { WebControllingMessungdesEBusinessErfolges,
    title = "Web-Controlling: Messung des E-Business-Erfolges",
    author = "Birol {Demir}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832472238",
    url = "https://m.diplom.de/document/222527"
}