LI, Fangfang. Retrieval and Recommendation of English Learning Resources Based on Knowledge Correlation. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 17, n. 16, p. pp. 59–72, 2022. DOI: 10.3991/ijet.v17i16.33763. Disponível em: https://online-journals.org/index.php/i-jet/article/view/33763. Acesso em: 18 jul. 2024.