GEORGE, K. The Challenges of Finding Area (pp. 61--69). Ohio Journal of School Mathematics, [S. l.], v. 83, n. 1, 2019. Disponível em: https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/OJSM/article/view/7009. Acesso em: 30 apr. 2026.