“Palynomorph assemblages of the Cuayuca Formation (Paleogene), Puebla, southern Mexico. Part 1: trilete spores, monolete spores and gymnosperm pollen”, AMGH, vol. 42, no. 3, pp. 567–578, Apr. 2013, Accessed: Sep. 13, 2025. [Online]. Available: https://ameghiniana.org.ar/index.php/ameghiniana/article/view/925