Santacruz Vallejo, Santiago Andrés, and José Alí Moncada Rangel. “Perceptions of Visitors on the Urban Green Areas of the City of Tulcán. Environmental Educational Implications”. Iberoamerican Environment & Sustainability Journal 2, no. 2 (December 27, 2019): 14–22. Accessed May 3, 2026. https://rias.unesum.edu.ec/index.php/revista/article/view/45.