Paz, L. F., and J. C. Martínez. “Numerical Competencies of Sixth Grade Students of the Nuestra Señora De Guadalupe Municipal Educational Institution in the Township of Botanilla in Pasto - Colombia”. Impacto Científico, Vol. 17, no. 2, Dec. 2022, pp. 349-71, https://produccioncientifica.luz.edu.ve/index.php/impacto/article/view/39247.