1. Ball, M. (2011). How do crowdsourcing, the internet of things and big data converge on geospatial technology?
http://www.vector1media.com/spatialsustain/how-do-crowdsourcing-the-internet-of-things-and-big-data-converge-on-geospatial-technology.html
. Accessed January 22, 2012.
2. Bennett, J. (2010). OpenStreetMap. Birmingham: Packt Publishing Ltd.
3. Bryan, J. (2010). Force multipliers: Geography, militarism, and the Bowman expeditions. Political Geography, 29(8), 414–416.
4. Cairncross, F. (1995). The death of distance. Economist, 336(7934), 5–6 (30 September).
5. CORDIS (2010). Riding the wave: How Europe can gain from the rising tide of scientific data.Final report of the high level expert group on scientific data.
http://cordis.europa.eu/fp7/ict/e-infrastructure/docs/hlg-sdi-report.pdf