KUNG, S. H.; ZOHDY, M. A.; BOUCHAFFRA, D. 3D HMM-based Facial Expression Recognition using Histogram of Oriented Optical Flow. Transactions on Engineering and Computing Sciences, [S. l.], v. 3, n. 6, p. 42, 2016. DOI: 10.14738/tmlai.36.1661. Disponível em: https://journals.scholarpublishing.org/index.php/TMLAI/article/view/1661. Acesso em: 6 may. 2024.