Caviedes Rubio, Diego Iván, and Alfredo Olaya Amaya. “Ecotourism in Protected Areas in Colombia: A Review of Environmental Impact With Emphasis on Environmental Sustainability Standards”. Revista Luna Azul (On Line), no. 46 (January 1, 2018): 311–330. Accessed July 3, 2024. https://revistasojs.ucaldas.edu.co/index.php/lunazul/article/view/3271.