Cass, María, Diana Morales, and Pedro Mayoral. “Study of the Use of Tangible-Ludic Materials in Elementary School”. CIEX JOURNAL 1, no. 12 (April 30, 2021): 51–69. Accessed February 24, 2025. https://journalv2.ciex.edu.mx/index.php/cJ/article/view/124.