Paula-Acosta, Caridad Amado, Jesús Pérez-López, and Julio Jesús Sierra-Socorro , trans. “Environmental Education With an Integrative Approach. An Experience in the Initial Formation of Teachers of Mathematics and Physics”. Revista Electrónica Educare 23, no. 1 (January 1, 2019): 1–22. Accessed April 29, 2024. https://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/9089.