ALVARADO LEÓN, C. I.; GARZA TARAZONA, S. The defensive nature of Xochicalco (650-1100 AD). Arqueología, [S. l.], n. 43, p. 136–154, 2010. Disponível em: https://revistas.inah.gob.mx/index.php/arqueologia/article/view/3459. Acesso em: 22 jul. 2024.