AN, X.; QU, C. A Hierarchical Learning Model based on Deep Learning and its Application in a SPOC and Flipped Classroom. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 16, n. 09, p. pp. 76–93, 2021. DOI: 10.3991/ijet.v16i09.23009. Disponível em: https://online-journals.org/index.php/i-jet/article/view/23009. Acesso em: 22 jan. 2022.