1. Smith, D. W. Human Longevity. (Oxford Univ. Press, New York, 1993 ).
2. Preston, S. H. in Forecasting The Health of Elderly Populations (eds Manton, K. G., Singer, B. H. & Suzman, R. M.) 51–77 (Springer, New York, 1991).
3. Preston, S. H. Mortality Patterns in National Populations, with Special Reference to Recorded Cause of Death. (Academic, New York, 1976).
4. Lee, R. D. in Demography of Aging (eds Martin, L. G. & Preston, S.H.) 8– 49 (National Academy Press, Washington DC, 1994).
5. World Bank Policy Research Report Averting the Old Age Crisis: Policies to Protect the Old and Promote Growth (Oxford Univ. Press, Oxford, 1994).