1.
Torres M, Cañadas M, Moreno A, Gómez P. Structures in direct and inverse forms of a function evidenced by 7–8-year-old students. Uniciencia [Internet]. 31Jul.2021 [cited 18Aug.2022];35(2):1-6. Available from: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/14695