LIU, Yi; LIU, Xiangyu; SUN, Zequn; HU, Wei. Answering the Unanswerable Is to Err Knowingly: Analyzing and Mitigating Abstention Failures in Large Reasoning Models. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 40, n. 38, p. 32231–32239, 2026. DOI: 10.1609/aaai.v40i38.40496. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/40496. Acesso em: 14 may. 2026.