Chávez/Lara, Claudia M., et al. “Ostracode and C N Based Paleoecological Record from Santiaguillo Basin of Subtropical Mexico over Last 27 Cal Kyr BP”. Revista Mexicana De Ciencias Geológicas, vol. 32, no. 1, Apr. 2015, doi:10.22201/cgeo.20072902e.2015.1.270.