Sources

Every source backing a fact on Risø DTU National Laboratory for Sustainable Energy's own page, deduplicated — the same source backing several facts appears once.

• Second Workshop on Human Computer Interaction with Mobile Devices — https://www.dcs.gla.ac.uk/mobile99/
• https://github.com/sven-mayer/mobilehci-statistics — https://github.com/sven-mayer/mobilehci-statistics