Guacaneme, Sandra Acosta, and Freddy Díaz Díaz. “Strategy for the Sustainable Use of Ecotourism in the Route of the Colombian Piedemonte”. European Journal of Sustainable Development 7, no. 3 (October 1, 2018): 225. Accessed February 24, 2024. https://ojs.ecsdev.org/index.php/ejsd/article/view/704.