Guidelines for the analysis of mathematics textbooks lessons on the subject of proportionality. Uniciencia, [S. l.], v. 36, n. 1, p. 1–19, 2022. DOI: 10.15359/ru.36-1.14. Disponível em: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/15399.. Acesso em: 29 apr. 2024.