FREDERKING, R.; THORPE, C.; WALKER, E.; POWELL, L.; MINTON, S.; DURHAM, J. Letters. AI Magazine, [S. l.], v. 5, n. 2, p. 3, 1984. DOI: 10.1609/aimag.v5i2.432. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/432. Acesso em: 2 mar. 2024.