XU, Liuwei. The Application of Gray Model and Support Vector Machine in the Forecast of Online Public Opinion. International Journal of Online and Biomedical Engineering (iJOE), [S. l.], v. 9, n. S2, p. pp. 31–34, 2013. DOI: 10.3991/ijoe.v9iS2.2566. Disponível em: https://online-journals.org/index.php/i-joe/article/view/2566. Acesso em: 20 apr. 2024.