KIZILTOPRAK, Ayhan; YAVUZSOY KÖSE, Nilüfer. 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://www.iejee.com/index.php/IEJEE/article/view/305. Acesso em: 5 aug. 2026.