MOYER, T. O.; KRACH, R. M. Formulas! Formulas! Everywhere! A few activities to introduce area. Ohio Journal of School Mathematics, [S. l.], v. 92, n. 1, p. 13–26, 2022. Disponível em: https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/OJSM/article/view/9071. Acesso em: 29 apr. 2026.