1. Some evidence of chronology and palaeoecology of Sterkfontein, Swartkrans and Kromdraai from the fossil Bovidae
2. An Introduction to Human Evolutionary Anatomy 1990
3. Bamford, M., 28th Annual Report, PARU: 12 (1994).
4. CHRISTIE, P.W., FORM AND FUNCTION OF AFAR ANKLE, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 47: 123 (1977).
5. Clarke, R. J., Hominid Evolution: Past, Present and Future: 287 (1995).