1. Agence France-Presse. 2012. “Chemical Exposure Influences Rat Behavior for Generations.” The Raw Story, May 22,
http://www.rawstory.com/
rs/2012/05/22/chemical-exposure-influences-rat-behavior-for-generations/.
2. Axelrod, Robert. 2006. The Evolution of Cooperation. New York: Basic Books.
3. Barton, Jo and Jules Pretty. 2010. “What Is the Best Dose of Nature and Green Exercise for Improving Mental Health? A Multi-study Analysis.” Environmental Science and Technology, 44(10): 3947–3955,
http://pubs.acs.org/
doi/abs/10.1021/es903183r.
4. Berger, Peter and Thomas Luckmann. 1967. The Social Construction of Reality: A Treatise on the Sociology of Knowledge. New York: Anchor.
5. Cacioppo, J. T., J. H. Fowler, and N. A. Christakis. 2009. “Alone in the Crowd: The Structure and Spread of Loneliness in a Large Social Network.” Journal of Personality and Social Psychology, 97: 977–991.