OCHOA, X.; ZHAO, H. OpenOPAF: An Open Source Multimodal System for Automated Feedback for Oral Presentations. Journal of Learning Analytics, [S. l.], v. 11, n. 3, p. 224-248, 2024. DOI: 10.18608/jla.2024.8411. Disponível em: https://learning-analytics.info/index.php/JLA/article/view/8411. Acesso em: 22 apr. 2026.