CIOFI, Carmine; SCANDURRA, Graziella. Very Simple and Inexpensive System for Distance Learning with the Use of Chalkboard. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 16, n. 09, p. pp. 263–277, 2021. DOI: 10.3991/ijet.v16i09.20017. Disponível em: https://online-journals.org/index.php/i-jet/article/view/20017. Acesso em: 18 jul. 2024.