Rodrigues Rézio, Ana Sofia. “Algebraic Thinking: Conceptions of Elementary School Teachers”. Revista Ensayos Pedagógicos 9, no. 1 (July 7, 2014): 121–135. Accessed April 28, 2024. https://www.revistas.una.ac.cr/index.php/ensayospedagogicos/article/view/6734.