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3. Carey, J. R., & Tuljapurkur, S. (Eds.) (2003). Life span: Evolutionary, ecological, and demographic perspectives. A Supplement to Vol. 29, 2003, Population and Development Review. New York: Population Council. See esp. J.R. Carey, Life span: A conceptual overview, pp. 1–18.
4. Gavrilov, L., & Gavrilova, N. (1991). The biology of life span: A quantitative approach. New York: Taylor & Francis.
5. Gruman, G. J. (2003). A history of ideas about the prolongation of life. In cooperation with the International Longevity Center. New York: Springer.