BREWKA, G.; NIEMELA, I.; TRUSZCZYNSKI, M. Preferences and Nonmonotonic Reasoning. AI Magazine, [S. l.], v. 29, n. 4, p. 69, 2008. DOI: 10.1609/aimag.v29i4.2179. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/2179. Acesso em: 29 mar. 2024.