References

Kahneman, D. (2011) Thinking, Fast and Slow, New York: Farrar, Straus and Giroux.

Keith Still, G. (2019) Visualising crowd density. Available at: http://www.gkstill.com/ Support/ crowd-density/ CrowdDensity-2.html [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] (Accessed: 04/07/2019).

Statista (2018) ‘Number of pet cats in the United Kingdom (UK) from 2010/11 to 2016/17 (in millions)’. Available at: www.statista.com/ statistics/ 515381/ cats-population-in-the-united-kingdom-uk/ (Accessed: 05/04/2019).

Surowiecki, J. (2004) The Wisdom of Crowds, New York: Doubleday.