1. Burger, J.M. and Shelton, M. (2011). Changing everyday health behaviors through descriptive norm manipulations. Social Influence, 6(2), 69–77.
2. Sunstein, C.R. and Thaler, R. (2008). Nudge: Improving Decisions about Health, Wealth, and Happiness. New Haven: Yale University Press.
3. Sunstein, C.R. (2014). Nudges and public policy. Behavioural Exchange. Retrieved August 12, 2014, from http://bx2014.org/sites/bx/media/255.pdf.
4. Kuang, C. (2012, March). In the cafeteria, google gets healthy. Fast Company. Retrieved August 12, 2014, from http://goo.gl/KF9M7.
5. Kallbekken, S. And Sælen, H. (2013). “Nudging” hotel guests to reduce food waste as a win–win environmental measure. Economics Letters, 119(3), 325–7.