@book { DerTrendzumCloudComputing,
    title = "Der Trend zum Cloud Computing",
    author = "Maximilian {Ritz}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656129172",
    url = "https://www.hausarbeiten.de/document/188994"
}