SoTA with Less: MCTS-Guided Sample Selection for Data-Efficient Visual Reasoning Self-Improvement - Wang, Xiyao; Yang, Zhengyuan; Feng, Chao; Lu, Hongjin; Li, Linjie; Lin, Chung-Ching; Lin, Kevin; Huang, Furong; Wang, Lijuan (Advances in Neural Information Processing Systems, 2025)