NGUYEN , T. N.; NGUYEN , A. T. Method for building recommender systems in e-learning. Journal of Technical Education Science, [S. l.], v. 6, n. 2, p. 28–41, 2011. Disponível em: https://www.jte.edu.vn/index.php/jte/article/view/874. Acesso em: 7 apr. 2026.