1. ITU: The Little Data Book on Information and Communication Technology 2013. The World Bank - International Telecommunication Union (2013)
2. Graham, J.: ‘Elderly’ No More. The New Old Age - Caring and Coping. The New York Times (2012)
3. World-Health-Organization, Definition of an older or elderly person. Proposed Working Definition of an Older Person in Africa for the MDS Project (2014),
http://www.who.int/healthinfo/survey/ageingdefnolder/en/
(accessed February 20, 2014)
4. Prensky, M.: Digital natives, digital immigrants. On the Horizon 9 (2001)
5. Prensky, M.: Digital Natives, Digital Immigrants, Part II: Do They Really Think Differently? On the Horizon 9 (2001)