FREILING, M.; ALEXANDE, J.; MESSICK, S.; REHFUSS, S.; SHULMAN, S. Starting a Knowledge Engineering Project: A Step-By-Step Approach. AI Magazine, [S. l.], v. 6, n. 3, p. 150, 1985. DOI: 10.1609/aimag.v6i3.496. Disponível em: https://ojs.aaai.org/index.php/aimagazine/article/view/496. Acesso em: 26 jan. 2021.