1. Abadie, J., Barbeau, J. & Coppens, Y. C.r. Acad. Sci., Paris 248, 3329–3330 (1959).
2. Coppens, Y. in Background to Evolution in Africa (eds Bishop, W. W. & Clark, J. D.) 89–97 (Univ, Chicago Press, 1967).
3. Coppens, Y. C.r. Acad. Sci., Paris 260, 2869–2871 (1965).
4. Johanson, D. C., White, T. D. & Coppens, Y. Am. J. phys. Anthrop. 57, 545–603 (1982).
5. Schneider, J. L. thesis, Univ. Avignon (1989).