XU, Chunyan. A Personalized Recommender System Based on Library Database. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 12, n. 12, p. pp. 134–141, 2017. DOI: 10.3991/ijet.v12i12.7964. Disponível em: https://online-journals.org/index.php/i-jet/article/view/7964. Acesso em: 25 apr. 2024.