TAO, Cuiping. An Evaluation Model of the Online Learning Effect Based on Fuzzy Mathematics. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 16, n. 10, p. pp. 54–70, 2021. DOI: 10.3991/ijet.v16i10.22749. Disponível em: https://online-journals.org/index.php/i-jet/article/view/22749. Acesso em: 27 apr. 2024.