MARTINEAU, J.; FININ, T. Delta TFIDF: An Improved Feature Space for Sentiment Analysis. Proceedings of the International AAAI Conference on Web and Social Media, [S. l.], v. 3, n. 1, p. 258-261, 2009. DOI: 10.1609/icwsm.v3i1.13979. Disponível em: https://ojs.aaai.org/index.php/ICWSM/article/view/13979. Acesso em: 29 may. 2024.