1. Beard J, Biggs S, Bloom DE, Fried LP, Hogan PR, et al. (2012) Global population ageing: peril or promise? (No. 8912). Program on the Global Demography of Aging.
2. Statistics Canada (2011) The Canadian Population in 2011: Age and Sex.
3. Tornstam L (2003) Gerotranscendence from young old age to old old age. Online publication of the social gerontology group, Uppsala, Sweden.
4. Tornstam L (2005) Gerotranscendence: A developmental theory of positive aging. Springer Publishing, New York, USA.
5. Introducing older people to the theory of gerotranscendence;Wadensten;J Adv Nurs 52(4),2005