References

Total daily change with age equals average lifetime change
James W. Vaupel
Demographic Research, Volume 22, Article 36

Goldstein, J.R. (2009). Life lived equals life left in stationary populations. Demographic Research 20(2): 3-6. [ doi:10.4054/DemRes.2009.20.2 ]
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Keyfitz, N. (1977). Applied Mathematical Demography. New York: Wiley.
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Preston, S.H. (1976). Family sizes of children and family sizes of women. Demography 13(1): 105-114. [ doi:10.2307/2060423 ]
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Zhang, Z. and Vaupel, J.W. (2009). The age separating early deaths from late deaths. Demographic Research 20(29): 721-730. [ doi:10.4054/DemRes.2009.20.29 ]
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