Ortega-Obregón, Carlos, et al. “Geochemistry of Carboniferous Low Metamorphic Grade Sedimentary and Tholeiitic Igneous Rocks in the Western Acatlán Complex, Southern Mexico: Deposition Along the Active Western Margin of Pangea”. Revista Mexicana De Ciencias Geológicas, vol. 27, no. 2, Feb. 2014, https://rmcg.unam.mx/index.php/rmcg/article/view/301.