1. Kinsella, K., & Wan, H. (2009). An aging world 2008. Washington, DC: U.S. Census Bureau, U.S. Government Printing Office. International population reports P95/09-1.
2. World Health Organization. (2012). Good health adds life to years. Global brief for World Health Day 2012. Geneva: WHO Document Production Services.
3. Di Novi, C., Jacobs, R., & Migheli, M. (2013). The quality of life of female informal caregivers: From Scandinavia to the Mediterranean Sea. York: Centre for Health Economics, University of York. CHE research paper 84.
4. Hoffmann, F., & Rodrigues, R. (2010). Informal carers: Who takes care of them? Vienna: European Centre for Social Welfare Policy and Research. Policy Briefs.
5. European Foundation for the Improvement of Living and Working Conditions. (2004). Health and care in an enlarged Europe. Quality of life in Europe. Dublin, Ireland.