BRACHMAN, R. J. I Lied About the Trees, Or, Defaults and Definitions in Knowledge Representation. AI Magazine, [S. l.], v. 6, n. 3, p. 80, 1985. DOI: 10.1609/aimag.v6i3.490. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/490. Acesso em: 19 apr. 2024.