SPEAKMAN, M.; COURTNEY, S. A. Exploring Matrix Multiplication with Manipulatives. Ohio Journal of School Mathematics, [S. l.], v. 88, n. 1, 2021. Disponível em: https://www.osu.tests.sfulib4.publicknowledgeproject.org/index.php/OJSM/article/view/8395. Acesso em: 29 apr. 2026.