L. S. Sachica Velazco, E. Peña Herrera, and L. P. Valdelamar Zafra, “Pillars in children’s learning”, Rastros rostros, vol. 5, no. 9, Dec. 2002, Accessed: Jul. 06, 2026. Available: https://revistas.ucc.edu.co/index.php/ra/article/view/4691