1. World population ageing, 1950–2050. United nations, Department of Economic and Social Affairs, Population Division, issue 207. 2002.
2. World Population Ageing: Highlights (ST/ESA/SER.A/430). United Nations, Department of Economic and Social Affairs, Population Division. 2019. https://www.un.org/en/development/desa/population/publications/pdf/ageing/WorldPopulationAgeing2019-Report.pdf. Accessed 01 Feb 2020.
3. Khan H. Population ageing in a globalized world: risks and dilemmas? J Eval Clin Pract. 2018;25:754–60. https://doi.org/10.1111/jep.13071.
4. Global Health and Aging. World Health Organization. 2011. https://www.who.int/ageing/publications/global_health.pdf?ua=1. Accessed 01 Feb 2020.
5. Global action plan on the public health response to dementia 2017–2025, World Health Organization. 2017 https://www.who.int/ageing/publications/global_health.pdf?ua=1 . Accessed 01 Feb 2020.