1. A comparison between ambient assisted living systems;Darwish,2015
2. The 2012 Ageing Report. Economic and Budgetary Projections for the 27 EU Member States (2010–2060),2012
3. World Report on Ageing and Health
http://apps.who.int/iris/bitstream/10665/186463/1/9789240694811_eng.pdf?ua=1