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Gold, MR; Stevenson, D; Fryback, DG (2002). "HALYS and QALYS and DALYS, oh my: similarities and differences in summary measures of population health". Annual Review of Public Health. 23: 115–34. doi:10.1146/annurev.publhealth.23.100901.140513. PMID11910057.
Kaplan, Hillard; Hill, Kim; Lancaster, Jane; Hurtado, A. Magdalena (2000). "A theory of human life history evolution: Diet, intelligence, and longevity". Evolutionary Anthropology: Issues, News, and Reviews. 9 (4): 156–185. doi:10.1002/1520-6505(2000)9:4<156::AID-EVAN5>3.0.CO;2-7. S2CID2363289.