Heras Villanueva, Miguel, and Carlos Gómez Chiñas. “Exports in Mexico: An Analysis of Cointegration and Causality (1980-2012)”. Norteamérica, Revista Académica del CISAN-UNAM 10, no. 1 (June 20, 2022). Accessed July 3, 2025. https://www.revistanorteamerica.unam.mx/index.php/nam/article/view/226.