World Bank (2012) Financial crisis.
 Vita, A.J., Terry, R.B., Hubert, H.B. and Fries, J.F (1998) Aging, health risks, and cumulative disability. New England Journal of Medicine, 338, 1035-1104.
 Majery, N., Duveau, A., Perleau, M. and Touillaux, D. (2007) Work Ability Index (WAI) in a population of 40+ in luxemburg. Proceedings of the 3rd International Symposium on Work Ability, 22-24 October 2007, Hanoi, 7.
 Matsushita, S. (1996) Longevity, disease, and duration of disability. Japanese Journal of Geriatrics, 33, 916-922.
 Bryant, L., Altpeter, M. and Whitelaw, N. (2006) Evaluation of health promotion programs for older adults: An Introduction. The Journal of Applied Gerontology, 25, 197-213. doi:10.1177/0733464806288562
 Foster, E.M. and Skoog, G.R. (2004) The Markov assumption of work-life expectancy. Journal of Forensic Economics, 17, 167-183.
 Vigon, V. (2011) Homogeneous markovian bridges. Annales De l’Institut Henri Poincare (B) Probability and Statistics, 47, 875-916.
 Goedhard, G.R. and Goedhard, W.A. (2007) Extending the working life? Proceedings of the 3rd International Symposium on Work Ability, 22-24 October 2007, Hanoi, 22.
 Ilmarinen, J. (2007) Towards a better and longer work life for older workers. Finnish Institute of Occupational Health, Helsinki.
 Maltby, T. and Ilmarinen, J. (2006) Moving beyond the ‘cliff edge’? Age regulations and a sustainable future for employment in later life. Journal of Occupational Medicine, 56, 361-364. doi:10.1093/occmed/kql043
 Altpeter, M., Bryant, L., Schneider, E. and Whitelaw, N. (2006) Evidence-based health practice: Knowing and using what works for older adults. Home Health Care Services Quarterly, 1/2, 1-11. doi:10.1300/J027v25n01_01
 Manini, T.M. and Pahor, M. (2009) Physical activity and maintaining physical function in older adults. British Journal of Sports Medicine, 43, 28-31.
 Gutheil, I.A. (1996) Introduction. The many faces of aging: Challenges for the future. Gerontologist, 36, 13-14.
 Burtless, G.T. and Quinn, J.F. (2000) Retirement trends and policies to encourage work among older Americans. Annual Conference of the National Academy of Social Insurance, 26-27 January 2000, Washington DC, 1-39.
 Rice, D.P. and Fineman, N. (2004) Economic Implications of increased longevity in the United States. Annual Reviews Public Health, 25, 457-473.
 Nurminen, M.M., Heathcote, C.R. and Davis, B.A. (2004) Estimating marginal cohort working life expectancies from sequential cross-sectional survey data. Journal of Official Statistics, 20, 495-517.
 Nurminen, M.M., Heathcote, C.R. and Davis, B.A. (2004) Estimating conditional working life expectancies from aggregate cohort data. The Internet Journal of Epidemiology, 1.
 Gustman, A.L. and Steinmeier, T.L. (1994) Employer provided health insurance and retirement behavior (No. w4307). National Bureau of Economic Research.