[Appiah, K. A. (2010). The Honor Code: How Moral Revolutions Happen. New York: W. W. Norton & Company.]Search in Google Scholar
[Bekoff, M. & Byers, J. (Eds.) (1998). Animal Play: Evolutionary, Comparative, and Ecological Perspectives. Cambridge, UK: Cambridge University Press.10.1017/CBO9780511608575]Search in Google Scholar
[Panter-Brick, C., Layton, R. & Rowley-Conwy, P. (Eds.) (2001). Hunter-Gatherers: An Interdisciplinary Perspective. Cambridge, UK: Cambridge University Press.]Search in Google Scholar
[Burghardt, G. (2005). The Genesis of Animal Play: Testing the Limits. Cambridge, MA: The MIT Press.]Search in Google Scholar
[Carroll, D. (2000). An Interdisciplinary Study of Sport as a Symbolic Hunt: A Theory of the Origin and Nature of Sport Based on Paleolithic Hunting. Lewiston, Canada: Edwin Mellen Press.]Search in Google Scholar
[Churchland, P. (2011). Braintrust: What Neuroscience Tells Us About Morality. Cambridge, NJ: Princeton University Press.10.1515/9781400838080]Search in Google Scholar
[Corning, P. (2011). The Fair Society: And the Pursuit of Social Justice. Chicago & London: University of Chicago Press.10.7208/chicago/9780226116303.001.0001]Search in Google Scholar
[IFPC (2010). The International Fair Play Committee Manifesto, 2010. Access on June 2, 2011. http://www.fairplayinternational.org/uploads/files/Manifeste_en.pdf]Search in Google Scholar
[French Committee for Fair Play (1974). Fair Play. Paris: UNESCO.]Search in Google Scholar
[Kretchmar, S. (1975). From Test to Contest: An Analysis of Two Kinds of Counterpoint in Sport. Journal of the Philosophy of Sport, 11, 23-30.10.1080/00948705.1975.10654094]Search in Google Scholar
[Kretchmar, S. (2005). Practical Philosophy of Sport and Physical Activity, 2nd ed. Champaign, IL: Human Kinetics.]Search in Google Scholar
[Kretchmar, S. (2007). The Normative Heights and Depths of Play. Journal of the Philosophy of Sport, XXXIV, 1, 1-12.10.1080/00948705.2007.9714705]Search in Google Scholar
[Ridley, M. (2003). Nature via Nurture: Genes, Experience, and What Makes Us Human. New York: Harper Collins.]Search in Google Scholar
[Singer, P. (1995). How Are We to Live? Ethics in an Age of Self-Interest. Amherst, NY: Prometheus Books.]Search in Google Scholar