1. Coe M. D., in Regional Perspectives on the Olmec, , Sharer R. J., Grove D. C., Eds. (Cambridge Univ. Press, Cambridge, 1989), pp. 68-82.
2. Diehl R. A., Coe M. D., in The Olmec World: Ritual and Rulership, , Guthrie J., Ed. (Art Museum, Princeton Univ., Princeton, NJ, 1995), pp. 11-25.
3. Clark J. E., Pye M. E., in Olmec Art and Archaeology in Mesoamerica, , Clark J. E., Pye M. E., Eds. (National Gallery of Art, Washington, DC, 2000), pp. 217-251.
4. Grove D. C. in (1) pp. 8–16.
5. Demarest A. in (1) pp. 303–344.