NIU, Mingzhe. Classification of Learning Sentiments of College Students Based on Topic Discussion Texts of Online Learning Platforms. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 17, n. 24, p. pp. 42–56, 2022. DOI: 10.3991/ijet.v17i24.35951. Disponível em: https://online-journals.org/index.php/i-jet/article/view/35951. Acesso em: 8 may. 2024.