1. Adams, M. J., 1983. Where two dimensions meet: the Kuba of Zaire. In Structure and cognition in art, D. K. Washburn, ed., pp. 40?55. New York: Cambridge University Press.
2. Ascher, M., 1987. Graphs in cultures: a study in ethnomathematics. Historia Mathematica, in press.
3. Ascher, M., & Ascher, R., 1981. Code of the quipu: a study in media, mathematics and culture. Ann Arbor: University of Michigan Press.
4. Ascher, M., & Ascher, R., 1986. Ethnomathematics. History of Science 24, 125?144.
5. Publicacoes culturais;M.-L. Bastin,1961