H. F.  Filkorn, ?Late Cretaceous (Maastrichtian) corals from Chiapas, Mexico?, in Abstracts of the 99th Annual Cordilleran Section, Geological Survey of America, vol. 35, Geological Survey of America, 2003, p. 32.

H. F.  Filkorn, Avendaño-Gil, J., Coutiño-José, M. A., and Vega-Vera, F. J., ?Corals from the Upper Cretaceous (Maastrichtian) Ocozocoautla Formation, Chiapas, Mexico?, Revista Mexicana de Ciencias Geológicas, vol. 22, pp. 115?128, 2005.