A comprehensive word difficulty index for L2 listening. Linguistic Proceedings Series, [S. l.], v. 9, n. 1, p. 81–84, 2018. DOI: 10.36505/ExLing-2018/09/0019/000352. Disponível em: https://publications.linguistic-society.com/index.php/ILS/article/view/504. Acesso em: 21 jun. 2026.