Parraguez Kobek, María Luisa, Alberto Ugarte, and Georgina Campero Aguilar. “Shale Gas in the United States: Transforming Energy Security in the Twenty-First Century”. Norteamérica, Revista Académica del CISAN-UNAM 10, no. 1 (June 30, 2015). Accessed April 30, 2025. https://www.revistanorteamerica.unam.mx/index.php/nam/article/view/223.