@book { InteraktionsmusterinOpenSourceCommunities,
    title = "Interaktionsmuster in OpenSource Communities",
    subtitle = "Open Source - eine Alternative zu traditionellen Geschäftsmodellen?",
    author = "René {Lehnert}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/227353"
}