“OPTIMIZACIÓN DE UNA RED DE TRANSPORTE COMBINADO PARA LA EXPORTACIÓN DEL CARBÓN DEL INTERIOR DE COLOMBIA(OPTIMIZATION OF A COMBINED EXPORT COAL TRANSPORT NETWORK FROM THE INTERIOR OF COLOMBIA)”, reveia, vol. 8, no. 16, pp. 103–113, Nov. 2013, Accessed: Jul. 18, 2025. [Online]. Available: https://eiaupgrade.metarevistas.org/index.php/reveia/article/view/435