CoCoA: A Minimum Bayes Risk Framework Bridging Confidence and Consistency for Uncertainty Quantification in LLMs - Vashurin, Roman; Goloburda, Maiya; Ilina, Albina; Rubashevskii, Aleksandr; Nakov, Preslav; Shelmanov, Artem; Panov, Maxim (Advances in Neural Information Processing Systems, 2025)