ESAN, A. O. .; OJO, B. E.; SOBOWALE, A. A.; OKOMBA, N. S.; OMODUNBI, B. A.; ADEBIYI, T. Facial Expression-Based Customer Sentiment Analysis for Service Quality Improvement using Deep Learning Techniques. LAUTECH Journal of Engineering and Technology, [S. l.], v. 20, n. 2, p. 40–51, 2026. Disponível em: https://www.laujet.com/index.php/laujet/article/view/1073. Acesso em: 19 jul. 2026.