Ferrusquía-Villafranca, Ismael, et al. “Depositional Systems of the Late Eocene Yolomécatl Formation, Northwestern Oaxaca, Southeastern Mexico: A First Approach”. Revista Mexicana De Ciencias Geológicas, vol. 35, no. 2, July 2018, pp. 142-57, doi:10.22201/cgeo.20072902e.2018.2.559.