DEWATER, K. M. Establishing Equations and Encountering Elves. Ohio Journal of School Mathematics, [S. l.], v. 77, n. 1, 2017. Disponível em: https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/OJSM/article/view/5964. Acesso em: 30 apr. 2026.