LIU, M.; WANG, Y. .; LIU, H. .; WU, S. .; LI, C. . Using Particle Swarm Optimization Approach for Student Engagement Measurement. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 11, n. 1, p. 12–21, 2015. Disponível em: http://www.ijlter.net/index.php/ijlter/article/view/1088. Acesso em: 6 aug. 2026.