1. Lorence, D.P., Park, H., Fox, S.: Racial disparities in health information access: resilience of the digital divide. J. Med. Syst. 4, 241–249 (2006)
2. Fallis, D.: Social epistemology and the digital divide. In: Weckert, J., Al-Saggaf, Y. (eds.) Proceedings Selected Papers from the Computers and Philosophy Conference (CAP2003), Canberra, Australia. CRPIT, vol. 37, pp. 79–84. ACS (2004)
3. Jennings, M.K., Zeitner, V.: Internet use and civic engagement: a longitudinal analysis. Public Opin. Q. 3, 311–334 (2003)
4. Wong, Y.C., Ho, K.M., Chen, H., Gu, D., Zeng, Q.: Digital divide challenges in low-income families: the case of Shanghai. J. Technol. Hum. Serv. 33, 53–71 (2015)
5. Pew Research Center: The smartphone difference 18 February 2018.
http://www.pewinternet.org/2015/04/01/us-smartphone-use-in-2015