Automatic Sentiment Classification of tweets using Natural Language Processing: Analyzing the Opinions of Twitter Users about Railway Services. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 16, n. 2, p. 1617–1625, 2019. Disponível em: https://ignited.in/index.php/jasrae/article/view/10378.. Acesso em: 26 dec. 2025.