PRIYATNO, A. M.; FIRMANANDA, F. I. N-Gram Feature for Comparison of Machine Learning Methods on Sentiment in Financial News Headlines. RIGGS: Journal of Artificial Intelligence and Digital Business, [S. l.], v. 1, n. 1, p. 01–06, 2022. DOI: 10.31004/riggs.v1i1.4. Disponível em: https://journal.ilmudata.co.id/index.php/RIGGS/article/view/4. Acesso em: 25 may. 2026.