Sources

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

• https://dl.acm.org/doi/proceedings/10.1145/1377999 — https://dl.acm.org/doi/proceedings/10.1145/1377999
• https://github.com/sven-mayer/mobilehci-statistics — https://github.com/sven-mayer/mobilehci-statistics
• https://link.springer.com/book/10.1007/3-540-45756-9 — https://link.springer.com/book/10.1007/3-540-45756-9
• https://personal.cis.strath.ac.uk/mark.dunlop/mobilehci01/ — https://personal.cis.strath.ac.uk/mark.dunlop/mobilehci01/