Guevara Benítez, Y., Hermosillo García, Ángela, López Hernández, A., Delgado Sánchez, U., García Vargas, G. R., y Rugerio Tapia, J. P. (2008). Mathematical skills in students from a low social and cultural stratum. Acta Colombiana de Psicología, 11(2), 13–24. Retrieved from https://actacolombianapsicologia.ucatolica.edu.co/index.php/acta-colombiana-psicologia/article/view/297