Zambrano Jurado, Juan Carlos. “Multilevel Analysis of School Performance in Mathematics for Fourth Grade of Basic Education in Colombia”. Sociedad y Economía, no. 25 (December 18, 2013): 205–235. Accessed April 19, 2024. https://sociedadyeconomia.univalle.edu.co/index.php/sociedad_y_economia/article/view/3970.