LOGNOLI, David. The Area of the Disk in Middle School Grade by GeoGebra. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 12, n. 11, p. pp. 28–40, 2017. DOI: 10.3991/ijet.v12i11.6834. Disponível em: https://online-journals.org/index.php/i-jet/article/view/6834. Acesso em: 4 may. 2024.