1. World Health Organization. World Report on Ageing and Health. World Health Organization. Geneva, Switzerland; 2015. ISBN: 9789241565042
2. Tang YP, Wang W, Fu YZ. Elder health status monitoring through analysis of activity. Chinese Journal of Computer Engineering and Applications. 2006;43(3):211-213
3. He W, Goodkind D, Kowal P. U.S. Census Bureau, International Population Reports, P95/16-1, An Aging World: 2015. Washington, DC: U.S. Government Publishing Office; 2016
4. Pan American Health Organization. Innovative Care for Chronic Conditions: Organizing and Delivering High Quality Care for Chronic Noncommunicable Diseases in the Americas. Washington, DC: PAHO, 2013
5. Najafi B, Aminian K, Paraschiv-Ionescu A, Loew F, Bula CJ, Robert P. Ambulatory system for human motion analysis using a kinematic sensor: Monitoring of daily physical activity in the elderly. IEEE Transactions on Biomedical Engineering. 2003;50(6):711-723