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Philip J. Arnold III 2009 Settlement and Subsistence among the Early Formative Gulf Olmec. Journal of Anthropological Archaeology 28:397–411.
Jeffrey Blomster , Hector Neff , and Michael D. Glascock 2005 Olmec Pottery Production and Export in Ancient Mesoamerica as Determined through Elemental Analysis. Science 307:1068–1072.
James B. Stoltman , Joyce Marcus , Kent V. Flannery , James H. Burton , and Robert G. Moyle 2005 Petrographic Evidence Shows that Pottery Exchange between the Olmec and Their Neighbors Was Two Way. Proceedings of the National Academy of Sciences 102:11213–11218.