1. World Health Organization Regional Office for Europe. The European health report 2012. Charting the way to well-being. Copenhagen: World Health Organization; 2013.
2. Salive ME. Multimorbidity in older adults. Epidemiol Rev. 2013;35:75–83.
3. World Health Organization. Noncommunicable Disease Prevention and Health Promotion Department. Ageing and Life Course. Active Ageing. A Policy Framework. A contribution of the World Health Organization to the Second United Nations World Assembly on Ageing, Madrid, Spain, April 2002. http://apps.who.int/iris/bitstream/10665/67215/1/WHO_NMH_NPH_02.8.pdf . Accessed 28 Nov 2015.
4. World Health Organization Regional Office For Europe. Strategy and action plan for health ageing in Europe, 2012–2020. Regional Committee for Europe. Sixty-second session, Malta, 10–13 September 2012
5. Holmerova I, Ferreira M, Wija P, et al. Productive Ageing. Prague: International Longevity Centre Czech Republic, Centre for Expertise in Longevity and Long-term Care, Faculty of Humanities, Charles University in Prague; 2012