1. Barron, F. (1962). The needs for order and disorder as motives in creative activity. In C. W. Taylor, & F. Barren (Eds), Scientific creativity: Its recognition and development, (pp. 139–152). New York: Wiley.
2. Campbell, D. T., & Fiske, D. W. (1959). Convergent and discriminant validation by the multitraitmultimethod matrix. Psychological Bulletin, 56, 81–105.
3. Cattell, J. M. (1903). A statistical study of eminent men. Popular Science Monthly, 32, 359–377.
4. Cattell, J. M. (1910). A further statistical study of American men of science. Science, 32, 633–648.
5. Cattell, R. B. (1962). The personality and motivation of the researcher from measurements of contemporaries and from biography. In C. W. Taylor & F. Barron (Eds), Scientific creativity: Its recognition and development. New York: Wiley.