SUSANTI, Y. .; TOKUNAGA, T. .; NISHIKAWA, H. .; OBARI, H. . Controlling item difficulty for automatic vocabulary question generation. Research and Practice in Technology Enhanced Learning, [S. l.], v. 12, 2017. DOI: 10.58459/rptel.2017.12%p. Disponível em: https://rptel.apsce.net/index.php/RPTEL/article/view/2017-12025. Acesso em: 21 oct. 2025.