PHƯƠNG, N. D.; PHƯƠNG, T. M. A collaborative filtering algorithm for sparse data. Journal of Computer Science and Cybernetics, [S. l.], v. 24, n. 1, p. 62–74, 2012. DOI: 10.15625/1813-9663/24/1/1229. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/1229. Acesso em: 4 may. 2024.