SPEAKMAN, .; COURTNEY, . A. Exploring Matrix Multiplication with Manipulatives. Ohio Journal of School Mathematics, [S. l.], v. 88, n. 1, 2021. Disponível em: http://voyager.janeway.systems:9999/index.php/OJSM/article/view/8395. Acesso em: 7 nov. 2026.