KIZILTOPRAK, A.; YAVUZSOY KÖSE, N. Relational thinking: The bridge between arithmetic and algebra. International Electronic Journal of Elementary Education, [S. l.], v. 10, n. 1, p. 131–145, 2017. Disponível em: https://iejee.com/index.php/IEJEE/article/view/305. Acesso em: 30 jan. 2025.