@book { CaseStudyPeoplePCIsthereafreelunch,
    title = "Case Study: PeoplePC: Is there a free lunch? ",
    author = "Kimberly {Wylie}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638521543",
    url = "https://www.hausarbeiten.de/document/57826"
}