1. ADAMS, RICHARD E. 1999 Río Azul: An Ancient Maya City. Norman: University of Oklahoma Press.
2. ARREDONDO LEIVA, ERNESTO 2009 El complejo amurallado de Naachtun: Architectura, guerra y política. XXII Simposio de Investigaciones Arqueológicas en Guatemala, 2008, edited by Juan P. Laporte, Barbara Arroyo,Héctor Mejia, pp. 1477-1495. Guatemala City: Museo Nacional de Arqueologia y Etnologia.
3. BALL, JOSEPH W. 1974 A Teotihuacan-style Cache from the Maya Lowlands. Archaeology 7(1): 2-9.
4. BALL, JOSEPH W. 1977 The Archaeological Ceramics of Becan, Campeche, Middle American Research Institute Publication 43. New Orleans: Tulane University.
5. BALL, JOSEPH W. 1983 Teotihuacan, The Maya and Ceramic Interchange: A contextual perspective. Highlandlowland nteraction in Mesoamerica: interdisciplinary approaches. A Conference at Dumbarton Oaks, edited by Arthur G. Miller, pp. 125-143, Washington: Dumbarton Oaks Research Library and Collection.