1.
González-Giraldo OE, Castellanos Sánchez MT. The abacus closed as a pedagogical mediation in the construction of multiplication and division operations in the third degree of official educational institutions. IyD [Internet]. 2019 Jun. 30 [cited 2026 Oct. 30];6(2):98-108. Available from: https://revistas.uniminuto.edu/index.php/IYD/article/view/1953