Lugo Arias, E.R., Sáenz Zapata, J.A. and Lugo Arias, J.L. (2018) “Productivity as a determinant of the competitiveness of palm oil exports from the department of Magdalena Colombia, 2007-2015”, Saber, Ciencia y Libertad, 13(1), pp. 145–163. doi:10.18041/2382-3240/saber.2018v13n1.2088.