Rivera Quintanilla, Jaime Ernesto. “Competitiveness Model of Agro-Industrial and Crafts Export, for the Establishment and Development of Strategies of Productive Chains, in the Eastern Zone of El Salvador”. Research Journal, vol. 1, no. 10, Apr. 2021, pp. 13-23, doi:10.5377/revunivo.v10i10.11367.