@book { BusinessIntelligenceinderCloud,
    title = "Business Intelligence in der Cloud",
    author = "Norman {Bernhardt}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640595167",
    url = "https://www.hausarbeiten.de/document/148409"
}