Byrne, D., Griffitt, W., & Stefaniak, D. (1967). Attraction and similarity of personality characteristics. Journal of Personality and Social Psychology, 5(1), 82–90

Byrne, D., & Rhamey, R. (1965). Magnitude of positive and negative reinforcements as a determinant of attraction. Journal of Personality and Social Psychology, 2(6), 884–889.

Csikszentmihalyi, M. (1990). Flow: The psychology of optimal experience. New York: Harper and Row.

Dweck, C. (2016). What Having a “Growth Mindset” Actually Means. Harvard Business Review, 1-5. 

Easterlin, R. A. (2003). Explaining happiness. PNAS, Vol. 100 (19) 11176-11183. 

Locke, E.A. (2002). Setting goals for life and happiness. In C.R. Snyder and S.J. Lopez (Eds.) Handbook of Positive Psychology. New York: Oxford University Press, pp. 299–312.

Macdonald, C. (1993). Toward Wisdom: Finding Our Way to Inner Peace, Love & Happiness. Anthony Hawke, 105-116.

McBride, M. (2010). Money, happiness, and aspirations: An experimental study. Journal of Economic Behavior & Organization, Vol. 73 (3) 262-276. 

Mogilner, C. (2010). The Pursuit of Happiness: Time, Money, and Social Connection. APS, Vol. 21 (9) 1348-1354. 

P. Alex Linley PhD, Stephen Joseph, Susan Harrington & Alex M. Wood (2006) Positive psychology: Past, present, and (possible) future, The Journal of Positive Psychology, Vol. 1:1, 3-16

 Sprott, J. C. (2005). Dynamical Models of Happiness . Nonlinear Dynamics, Psychology, and Life Sciences, Vol. 9 (1) 23-33. 

Woolfolk, R.L. (2002). The power of negative thinking: Truth, melancholia, and the tragic sense of life. Journal of Theoretical and Philosophical Psychology, Vol. 22 (1), 19–27.