W. R. Leonard and M. L. Robertson. Comparative primate energetics and hominid evolution. Am. J. Phys. Anthropol., volume 102, issue 2, pages 265-281, February 1997.

W. R. Leonard and M. L. Robertson. Comparative primate energetics and hominid evolution. Am. J. Phys. Anthropol., volume 102, issue 2, pages 265-281, February 1997.

W. R. Leonard and M. Hegmon. Evolution of P3 morphology in Australopithecus afarensis. Am J Phys Anthropol, volume 73, issue 1, pages 41-63, 1987.