Rocío Madrigal, A., Syedd León, R., Montero, E., & Vega-Baudrit, J. (2012). Analysis of national chemistry olympiad in Costa Rica: achievements and challenges for young people. Uniciencia, 26(1-2), 29-40. https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/3860