GRIOL, D.; MOLINA, J. M.; SANCHÍS DE MIGUEL, A. Developing multimodal conversational agents for an enhanced e-learning experience. ADCAIJ: Advances in Distributed Computing and Artificial Intelligence Journal, [S. l.], v. 3, n. 1, p. 13–26, 2014. DOI: 10.14201/ADCAIJ2014381326. Disponível em: https://revistas.usal.es/index.php/2255-2863/article/view/ADCAIJ2014311326. Acesso em: 13 aug. 2022.