HU, Ziyu. A CNN-Based Facial Expression Recognition System. Highlights in Science, Engineering and Technology, [S. l.], v. 39, p. 496–507, 2023. DOI: 10.54097/hset.v39i.6576. Disponível em: https://drpress.org/ojs/index.php/HSET/article/view/6576. Acesso em: 11 may. 2026.