Sources

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

• https://dl.acm.org/doi/proceedings/10.1145/1409240 — https://dl.acm.org/doi/proceedings/10.1145/1409240
• https://github.com/sven-mayer/mobilehci-statistics — https://github.com/sven-mayer/mobilehci-statistics