Collaborative Filtering: Data Sparsity Challenges . International Journal of Multidisciplinary and Current Research, [S. l.], v. 6, n. 6, p. 1379–1382, 2018. DOI: 10.14741/ijmcr/v.6.6.13. Disponível em: https://ijmcr.com/index.php/ijmcr/article/view/06.06.13. Acesso em: 28 aug. 2026.