WU, D. Review of Natural Language Understanding. AI Magazine, [S. l.], v. 10, n. 1, p. 88, 1989. DOI: 10.1609/aimag.v10i1.737. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/737. Acesso em: 21 sep. 2024.