FACIAL FEATURE EXTRACTION & APPEARANCE BASED HUMAN AFFECT RECOGNITION SYSTEM. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 5, n. 8, p. 20–26, 2018. Disponível em: https://www.ijaerd.org/index.php/IJAERD/article/view/3785. Acesso em: 8 sep. 2025.