Omaña, L. et al. 2022. A late Aptian planktic foraminiferal assemblage and pyrite framboids from the “Otates Horizon”, Cerro Boludo, Hidalgo, Mexico: paleoecological and paleoenvironmental implications. Revista Mexicana de Ciencias Geológicas. 39, 1 (Mar. 2022), 71–81. DOI:https://doi.org/10.22201/cgeo.20072902e.2022.1.1672.