COHEN, P. R.; HOFFMAN, R. R.; KIRRANE, D. Letters to the Editor. AI Magazine, [S. l.], v. 12, n. 3, p. 10, 1991. DOI: 10.1609/aimag.v12i3.901. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/901. Acesso em: 26 apr. 2024.