CHEIKES, B. A. Research in Artificial Intelligence at the University of Pennsylvania. AI Magazine, [S. l.], v. 7, n. 3, p. 128, 1986. DOI: 10.1609/aimag.v7i3.553. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/553. Acesso em: 22 aug. 2024.