Miller G. A. (1956). The magical number seven, plus or minus two: some limits on our capacity for processing information. Psychological Review, 63 (2): 81.
7
Cowan N. (2001). The magical number 4 in short-term memory: a reconsideration of mental storage capacity. Behavioral and Brain Sciences, 24: 87–185.
8
Tamnes C. K., Walhovd K. B., Grydeland H., Holland D., Østby Y., Dale A. M. & Fjell A. M. (2013). Longitudinal working memory development is related to structural maturation of frontal and parietal cortices. Journal of Cognitive Neuroscience, 25 (10): 1611–1623.
