REINFRANK, M. Second International Workshop on Nonmonotonic Reasoning. AI Magazine, [S. l.], v. 10, n. 1, p. 81, 1989. DOI: 10.1609/aimag.v10i1.733. Disponível em: https://ojs.aaai.org/aimagazine/index.php/aimagazine/article/view/733. Acesso em: 23 apr. 2024.