@book { DerFallMicrosoft,
    title = "Der Fall Microsoft",
    author = "Tatjana {Böttger}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640415212",
    url = "https://www.hausarbeiten.de/document/132626"
}