YANG, F.; ZHANG, R.; ZHAO, Y. Research on a Visual Sensing and Tracking System for Distance Education. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 14, n. 08, p. pp. 181–191, 2019. DOI: 10.3991/ijet.v14i08.9827. Disponível em: https://online-journals.org/index.php/i-jet/article/view/9827. Acesso em: 28 jun. 2022.