AL-ANI, M. S. Happiness Measurement Via Classroom Based on Face Tracking: Happiness Via Classroom. UHD Journal of Science and Technology, [S. l.], v. 3, n. 1, p. 9–18, 2019. DOI: 10.21928/uhdjst.v3n1y2019.pp9-18. Disponível em: https://journals.uhd.edu.iq/index.php/uhdjst/article/view/223. Acesso em: 5 may. 2024.