1. Mortality and life expectancy statistics (August 2010),
http://epp.eurostat.ec.europa.eu/statistics_explained/index.php/Mortality_and_life_expectancy_statistics
2. Lecture Notes in Computer Science;A. Sixsmith,2009
3. Chan, M., Campo, E., Esteve, D., Fourniols, J.: Smart Homes - Current features and future perspectives. Maturitas 64(2), 90–97 (2009) ISSN 0378-5122
4. Lecture Notes in Computer Science;B. Graf,2009
5. Cesta, A., Cortellessa, G., Giuliani, M.V., Pecora, F., Scopelliti, M., Tiberio, L.: Psychological Implications of Domestic Assistive Technology. PsychNology Journal 5(3), 229–252 (2007)