Maldonado, A. V. and Franco Gómez , N. M. del C. . (2018) “Principles of marketing and competitiveness as key strategies for the development of MSMEs in the province of El Oro”, INNOVA Reseach Journal, 3(10.1), pp. 195–201. doi: 10.33890/innova.v3.n10.1.2018.784.