METTREY, W. An Assessment of Tools for Building Large Knowledge-Based Systems. AI Magazine, [S. l.], v. 8, n. 4, p. 81, 1987. DOI: 10.1609/aimag.v8i4.625. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/625. Acesso em: 23 apr. 2024.