GARRIDOS, C.; BALASE, E. A. Students’ level of understanding of the basic concept of functions and relations: A conceptual analysis. The Mindanawan Journal of Mathematics, [S. l.], v. 2, n. 1, p. 54–65, 2011. Disponível em: https://journals.msuiit.edu.ph/tmjm/article/view/19. Acesso em: 24 nov. 2024.