1. Bannan, M. W. (1962). The vascular cambium and tree-ring development. In T. T. Kozlowski (Ed.), Tree growth. New York: Ronald.
2. Black, M. (1962). Models and metaphors. Ithaca, NY: Cornell University Press. Cain, D. J. (1986). Personal communication.
3. Cartwright, D. (1975). Trait and other sources of variance in the S-R inventory of anxiousness. Journal of Personality and Social Psychology, 32, 408–414.
4. Cartwright, D. (1979). Theories and models of personality. Dubuque, Iowa: Wm. C. Brown.
5. Cattell, R. B. (1972). The 16PF and basic personality structure: A reply to Eysenck. Journal of Behavioral Science, 1, 169–187.