1.
Alfaro Arce A, AlpĂ­zar Vargas M, Chaves Esquivel E. Methodological resources used by teachers in cycles I and II in basic general education in the region of Heredia, when they teach probability and statistics. RU [Internet]. 1Jan.2012 [cited 2Jul.2020];26(1-2):135-51. Available from: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/3869