González-Giraldo, Omaira Elizabeth, and María Teresa Castellanos Sánchez. “The Abacus Closed As a Pedagogical Mediation in the Construction of Multiplication and Division Operations in the Third Degree of Official Educational Institutions”. Inclusión y Desarrollo 6, no. 2 (June 30, 2019): 98–108. Accessed October 28, 2026. https://revistas.uniminuto.edu/index.php/IYD/article/view/1953.