1."The Big Five Personality Traits" by R. R. McCrae and O. P. John in Psychological Bulletin (1992).
2."Personality and Self-Esteem: A Big Five Model" by S. M. Cooper and R. D. Bowden in Journal of Personality and Social Psychology (1995).
3."The Relationship Between Personality Traits and Life Satisfaction" by S. M. Cooper and R. D. Bowden in Journal of Happiness Studies (2000).
4."Self-Concept and Self-Esteem: A Review of the Literature" by S. M. Cooper and R. D. Bowden in Journal of Personality Assessment (2001).