1. and (in press) Mandibular premolar root form and evolution in the Hominoidea. J. Anat.
2. (1962) Cultural factors in the evolution of the human dentition. In (ed): Culture and the evolution of man. New York: Oxford University Press, pp. 343-354.
3. (1978) Hominidae. In and (eds): Evolution of African Mammals. Cambridge: Harvard University Press, pp. 154-248.
4. The functional significance of primate mandibular form
5. A revision of the Oligocene apes of the Fayum Province, Egypt