Valdes Salazar, R. “Measuring Market Integration and Pricing Efficiency Along Regional Maize-Tortilla Chains of Mexico”. Revista De La Facultad De Ciencias Agrarias Uncuyo, vol. 50, no. 2, Dec. 2018, pp. 279-92, https://revistas.uncu.edu.ar/ojs3/index.php/RFCA/article/view/2961.