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Latimer B، Lovejoy CO (مارس 1989). "The calcaneus of Australopithecus afarensis and its implications for the evolution of bipedality". American Journal of Physical Anthropology. ج. 78 ع. 3: 369–86. DOI:10.1002/ajpa.1330780306. PMID:2929741.
Wittman، Anna Blackburn؛ Wall، L. Lewis (2007). "The evolutionary origins of obstructed labor: bipedalism, encephalization, and the human obstetric dilemma". Obstetrical & Gynecological Survey. ج. 62: 739–48. DOI:10.1097/01.ogx.0000286584.04310.5c. PMID:17925047.
Wang W، Crompton RH، Carey TS، وآخرون (ديسمبر 2004). "Comparison of inverse-dynamics musculo-skeletal models of AL 288-1 Australopithecus afarensis and KNM-WT 15000 Homo ergaster to modern humans, with implications for the evolution of bipedalism". Journal of Human Evolution. ج. 47 ع. 6: 453–78. DOI:10.1016/j.jhevol.2004.08.007. PMID:15566947.