“Analysis of the Evolution of Exports from the Tuna Sector to the European Union and Their Impact on the Trade Balance of Ecuador, Period 2014 - 2018”. Teorías, Enfoques Y Aplicaciones en Las Ciencias Sociales, vol. 13, no. 27, Dec. 2020, pp. 26-37, https://revistas2.uclave.org/index.php/teacs/article/view/3046.