HARKNESS, . S.; NOBLITT, . Pixels: Creating Lessons with Historical Connections Between Perimeter and Circumference. Ohio Journal of School Mathematics, [S. l.], v. 76, n. 2, 2017. Disponível em: http://voyager.janeway.systems:9999/index.php/OJSM/article/view/5831. Acesso em: 7 nov. 2026.