B. Nicholson, Henry. 2020. «Ehecatl Quetzalcoatl Vs. Topiltzin Quetzalcoatl of Tollan: A Problem in Mesoamerican Religion and History». Estudios De Cultura Náhuatl 59 (enero):211-30. https://nahuatl.historicas.unam.mx/index.php/ecn/article/view/77902.