1. Ziming Liu, (2005) "Reading behavior in the digital environment:Changes in reading behavior over the past ten years", Journal ofDocumentation, Vol. 61 Issue: 6, pp.700-712, doi: 10.1108/00220410510632040.
2. The magicalnumber seven, plus or minus two: some limits on our capacity for processinginformation. Miller, George A. Psychological Review, Vol 63(2), Mar 1956,81-97. http://dx.doi.org/10.1037/h0043158
3. The Impact ofTelevision Viewing on Brain Structures: Cross-Sectional and LongitudinalAnalyses. Hikaru Takeuchi, Hikaru Takeuchi et al. Cereb Cortex (2015) 25 (5): 1188-1197.