1. United Nations 2009, World population ageing, Report (2009)
2. Bourouis, A., Feham, M., Bouchachia, A.: A new architecture of a ubiquitous health monitoring system: a prototype of cloud mobile health monitoring system. The Computing Research Repository (2012)
3. Lustrek, M., Kaluza, B., Cvetkovic, B., Dovgan, E., Gjoreski, H., Mirchevska, V., Gams, M.: Confidence: ubiquitous care system to support independent living. DEMO at European Conference on Artificial Intelligence, pp. 1013–1014 (2012)
4. Lecture Notes in Computer Science;G.D. Abowd,1999
5. Vyas, N., Farringdon, J., Andre, D., Stivoric, J.I.: Machine learning and sensor fusion for estimating continuous energy expenditure. In: Innovative Applications of Artificial Intelligence Conference, pp. 1613–1620 (2012)