Amazonas, José Roberto, Alexexandre Barbosa de Lima, and Marcos Roberto Pereira Barretto. “Spectra-Based Sentiment Analysis”. INFOCOMP Journal of Computer Science 17, no. 2 (December 20, 2018): 01-06. Accessed August 5, 2020. http://infocomp.dcc.ufla.br/index.php/infocomp/article/view/571.