KHALIFA, A.; KATO, T.; YAMAMOTO, S. Learning Effect of Implicit Learning in Joining-in-type Robot-assisted Language Learning System. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 14, n. 02, p. pp. 105–123, 2019. DOI: 10.3991/ijet.v14i02.9212. Disponível em: https://online-journals.org/index.php/i-jet/article/view/9212. Acesso em: 20 aug. 2022.