Alley, D., & Crimmins, E. (2007). The demography of aging and work. In K.S. Shultz & G.A. Adams (Eds.), Aging and work in the 21st century (pp. 7-23). New York, NY: Psychology Press.
Denton, F.T., & Spencer, B.G. (2009). What is retirement? A review and assessment of alternative concepts and measures. Canadian Journal on Aging, 28, 63-76. doi: 10. 1017/SO714980809090047
Ekerdt, D.J. (2010). Frontiers of research on work and retirement. Journal of Gerontology: Social Sciences, 65B, 69-80. doi: 10.1093/geronb/gbp109.
McVittie, C., McKinlay, A., & Widdicombe, S. (2008). Passive and active nonemployment: age, employment and the identities of older non-working people. Journal of Aging Studies, 22, 248-255. doi: 10.1016/j.jaging.2007.04.003
Shultz, K.S., & Henkens, K. (2010). Introduction to the changing nature of retirement: An international perspective. International Journal of Manpower, 31, 265- 270. doi: 10.1108/01437721011050567
Shultz, K.S., & Wang, M. (2011). Psychological perspectives on the changing nature of retirement. American Psychologist, 66, 170-179. doi: 10.1037/a0022411