1. American Psychiatric Association (1983). Diagnostic and Statistic Manual of Mental Disorders, 3rd ed. Washington, DC: American Psychiatric Association.
2. Atkinson, R.C., and R.M. Shiffrin (1968). Human memory: A proposed system and its control processes. In K.W. Spence and J.T. Spence (Eds.), The Psychology of Learning and Motivation, Vol. 2. New York: Academic P, pp. 89–195.
3. Botwinick, J., and M. Storandt (1974). Memory Related Functions and Age. Springfield, IL: Charles C Thomas.
4. Brown, J.A. (1958). Some tests of the decay theory of immediate memory. Q. J. Exp. Psychol., 10, 12–21.
5. Cain, W.S. (1979). To know with the nose: Keys to odor identification. Science, 203, 467–470.