Alencastro Guerrero, Paúl, 		Intriago Ferrin, Ana, 		Calderón Bastidas, Héctor, AND 		Quiñonez Cabeza, Manuel.
" Incident factors in the volume exported by the port of Esmeraldas period 2012 - 2018" <em>mktDESCUBRE</em> [Online], Volume 1 Number 14 (10 December 2019)