LIU, Haifeng; WU, Zhaohui. Non-Negative Matrix Factorization with Constraints. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 24, n. 1, p. 506–511, 2010. DOI: 10.1609/aaai.v24i1.7681. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/7681. Acesso em: 21 may. 2026.