Coba jelasin Catatan dari Rumpun bahasa Mixe-Zoque dong

Justeson, John S., and Kaufman, Terrence, (1997),"A Newly Discovered Column in the Hieroglyphic Text on La Mojarra Stela 1: a Test of the Epi-Olmec Decipherment", Science, 07/11/97, Vol. 277 Issue 5323, p. 207.

Justeson, John S., and Kaufman, Terrence (2001) Epi-Olmec Hieroglyphic Writing and Texts .

Kaufman, Terrence, (2001) Nawa linguistic prehistory, published at website of the Mesoamerican Language Documentation Project

Brigham Young University press release on behalf of Brigham Young University archaeologist Stephen Houston and Yale University professor emeritus Michael Coe disputing Justeson/Kaufman findings.