1. Research, A.B.I.: The Mobile App Market will be Worth $27 Billion in 2013 as Tablet Revenue Grows (2013), https://www.abiresearch.com/press/the-mobile-app-market-will-be-worth-27-billion-in-
2. Gartner: Worldwide PC, Tablet and Mobile Phone Shipments to Grow 4.5 Percent in 2013 as Lower-Priced Devices Drive Growth (2013), http://www.gartner.com/newsroom/id/2610015
3. Apple Press: Apple - Press Info - Apple Reports Fourth Quarter Results, http://www.apple.com/pr/library/2013/10/28Apple-Reports-Fourth-Quarter-Results.html
4. De Oliveira, R., Cherubini, M., Oliver, N.: Influence of personality on satisfaction with mobile phone services. ACM Trans. Comput. Interact. 20, 1–23 (2013)
5. Chittaranjan, G., Blom, J., Gatica-Perez, D.: Who’s Who with Big-Five: Analyzing and Classifying Personality Traits with Smartphones. In: 2011 15th Annu. Int. Symp. Wearable Comput., pp. 29–36 (2011)