Guevara Benítez, Y., Hermosillo García, Ángela, López Hernández, A., Delgado Sánchez, U., García Vargas, G. R. and Rugerio Tapia, J. P. (2008) “Mathematical skills in students from a low social and cultural stratum”., Acta Colombiana de Psicología, 11(2), pp. 13–24. Available at: https://actacolombianapsicologia.ucatolica.edu.co/index.php/acta-colombiana-psicologia/article/view/297 (Accessed: 6 November 2026).