An Advanced Facial Expression Recognition System Using Novel Machine Learning Approach by Comparing CNN over LeNet. Journal of Pharmaceutical Negative Results, [S. l.], p. 1637–1644, 2022. DOI: 10.47750/pnr.2022.13.S04.195. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/1377.. Acesso em: 3 jun. 2026.