1. Atkinson, R. C., & Shiffrin, R. M. Human memory: A proposed system and its control processes. In K. W. Spence & J. T. Spence (Eds.), The psychology of learning and motivation (Vol. 2). New York: Academic Press, 1968.
2. Atkinson, R. C., & Shiffrin, R. M. The control of short-term memory. Scientific American, 1971, 224, 82–90.
3. Belmont, J. M., & Butterfield, E. C. The relations of short-term memory to development and intelligence. In L. P. Lipsitt & H. W. Reese (Eds.), Advances in child development and behavior. New York: Academic Press, 1969.
4. Bower, G. H., & Winzenz, D. Group structure, coding, and memory for digit series. Journal of Experimental Psychology Monograph, 1969, 80, 1–17.
5. Cohen, R. L., & Johansson, B. S. Some relevant factors in the transfer of material from short-term to long-term memory. Quarterly Journal of Experimental Psychology, 1967, 19, 300–308.