Sources

Every source backing a fact on Twitter's own page, deduplicated — the same source backing several facts appears once.

• https://github.com/sven-mayer/chi-statistics — https://github.com/sven-mayer/chi-statistics
• https://github.com/sven-mayer/chi-statistics — https://github.com/sven-mayer/chi-statistics
• https://github.com/sven-mayer/chi-statistics — https://github.com/sven-mayer/chi-statistics
• https://github.com/sven-mayer/mobilehci-statistics — https://github.com/sven-mayer/mobilehci-statistics