Gutiérrez, G. "Negotiating Aztec tributary demands in the tribute record of Tlapa." in Merchants, Markets, and Exchange in the Pre-Columbian World: Dumbarton Oaks Pre-Columbian Symposia and Colloquia May 27, 2013. Kenneth G. Hirth and Joanne Pillsbury, eds. Washington, DC: Dumbarton Oaks, 2015.

Gutiérrez, G. "Negotiating Aztec tributary demands in the tribute record of Tlapa." in Merchants, Markets, and Exchange in the Pre-Columbian World: Dumbarton Oaks Pre-Columbian Symposia and Colloquia May 27, 2013. Kenneth G. Hirth and Joanne Pillsbury, eds. Washington, DC: Dumbarton Oaks, 2015.