1. Xavier F, Ferraz MPT, Bisol LW, Fernandes DD, Schwanke C, Moriguchi EH. Octogenarians of Veranópolis: the psychological, social and health conditions of a representative group over the age 80 living in the community. Revista da AMRIGS. 2000;44(1/2):25–9.
2. Siddhisena KAP. Socio-economic implications of ageing in Sri Lanka: an overview, working paper WP105. Oxford: Oxford Institute of ageing; 2004.
3. Perera ELSJ. Ageing Population of Sri Lanka; Emerging issues, needs and policy implications; Thematic Report based on Census of Population and Housing 2012, United Nations Population Fund, Sri Lanka; 2017. [Accessed 8 Aug 2018]. Available from:
http://srilanka.unfpa.org
.
4. World Bank. Addressing the needs of an aging population. Human Development Unit South Asia Region; 2008.
5. World Health Organization. Active ageing: a policy framework. Geneva: WHO; 2002 [Accessed 19 Sept 2017]. Available from:
http://www.who.int/ageing/publications/active_ageing/en/