de Sahagún, Bernardino. The Florentine Codex: A General History of the Things of New Spain, edited by Charles E. Dibble, and Arthur J. O. Anderson. Vol. 1–13. Santa Fe: School of American Research, 1953–1982.
Bierhorst, John. History and mythology of the Aztecs: the Codex Chimalpopoca. Tucson, AZ: University of Arizona Press, 1992, pp. 75–84.
Miller, Mary Ellen, and Karl Taube. The gods and symbols of ancient Mexico and the Maya: an illustrated dictionary of Mesoamerican religion. London: Thames & Hudson Inc., 1993, pp. 117–118.